538784550 has 72 divisors (see below), whose sum is σ = 1450480824. Its totient is φ = 143383680.

The previous prime is 538784537. The next prime is 538784569. The reversal of 538784550 is 55487835.

538784550 is a `hidden beast` number, since 538 + 78 + 45 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 538784496 and 538784505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 306474 + ... + 308226.

It is an arithmetic number, because the mean of its divisors is an integer number (20145567).

Almost surely, 2^538784550 is an apocalyptic number.

538784550 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 538784550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725240412).

538784550 is an abundant number, since it is smaller than the sum of its proper divisors (911696274).

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

538784550 is a wasteful number, since it uses less digits than its factorization.

538784550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The square root of 538784550 is about 23211.7330244857. The cubic root of 538784550 is about 813.7138558419.

The spelling of 538784550 in words is "five hundred thirty-eight million, seven hundred eighty-four thousand, five hundred fifty".