538650 has 120 divisors (see below), whose sum is σ = 1800480. Its totient is φ = 116640.

The previous prime is 538649. The next prime is 538651. The reversal of 538650 is 56835.

538650 is a `hidden beast` number, since 5 + 3 + 8 + 650 = 666.

It is an interprime number because it is at equal distance from previous prime (538649) and next prime (538651).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (538651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 28341 + ... + 28359.

It is an arithmetic number, because the mean of its divisors is an integer number (15004).

538650 is a Friedman number, since it can be written as 855*630, using all its digits and the basic arithmetic operations.

It is a vampire number, since it can be written as 630 ⋅ 855 (with its own digits).

2⁵³⁸⁶⁵⁰ is an apocalyptic number.

538650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 538650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900240).

538650 is an abundant number, since it is smaller than the sum of its proper divisors (1261830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

538650 is a wasteful number, since it uses less digits than its factorization.

538650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 538650 is about 733.9277893635. The cubic root of 538650 is about 81.3646114284.

The spelling of 538650 in words is "five hundred thirty-eight thousand, six hundred fifty".