523649538 has 48 divisors (see below), whose sum is σ = 1264554720. Its totient is φ = 155634048.

The previous prime is 523649537. The next prime is 523649591. The reversal of 523649538 is 835946325.

523649538 is a `hidden beast` number, since 52 + 3 + 64 + 9 + 538 = 666.

It is a super-2 number, since 2×523649538² = 548417677295226888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 523649493 and 523649502.

It is not an unprimeable number, because it can be changed into a prime (523649537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39220 + ... + 50847.

It is an arithmetic number, because the mean of its divisors is an integer number (26344890).

Almost surely, 2^523649538 is an apocalyptic number.

523649538 is an abundant number, since it is smaller than the sum of its proper divisors (740905182).

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

523649538 is a wasteful number, since it uses less digits than its factorization.

523649538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90111 (or 90108 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 523649538 is about 22883.3900023576. The cubic root of 523649538 is about 806.0220230135.

The spelling of 523649538 in words is "five hundred twenty-three million, six hundred forty-nine thousand, five hundred thirty-eight".