521974944 has 72 divisors (see below), whose sum is σ = 1535575860. Its totient is φ = 167989248.

The previous prime is 521974933. The next prime is 521974961. The reversal of 521974944 is 449479125.

It can be written as a sum of positive squares in 2 ways, for example, as 520387344 + 1587600 = 22812^2 + 1260^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 521974944.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22897 + ... + 39600.

Almost surely, 2^521974944 is an apocalyptic number.

It is an amenable number.

521974944 is an abundant number, since it is smaller than the sum of its proper divisors (1013600916).

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

521974944 is a wasteful number, since it uses less digits than its factorization.

521974944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62542 (or 62531 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 521974944 is about 22846.7709753479. The cubic root of 521974944 is about 805.1619051172.

The spelling of 521974944 in words is "five hundred twenty-one million, nine hundred seventy-four thousand, nine hundred forty-four".