30913650 has 120 divisors (see below), whose sum is σ = 91149300. Its totient is φ = 7741440.

The previous prime is 30913621. The next prime is 30913651. The reversal of 30913650 is 5631903.

30913650 is a `hidden beast` number, since 3 + 0 + 9 + 1 + 3 + 650 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 17363889 + 13549761 = 4167^2 + 3681^2 .

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30913651) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 68626 + ... + 69074.

Almost surely, 2^30913650 is an apocalyptic number.

30913650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30913650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45574650).

30913650 is an abundant number, since it is smaller than the sum of its proper divisors (60235650).

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

30913650 is a wasteful number, since it uses less digits than its factorization.

30913650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 30913650 is about 5560.0044964011. The cubic root of 30913650 is about 313.8461184955.

The spelling of 30913650 in words is "thirty million, nine hundred thirteen thousand, six hundred fifty".