522520408 has 8 divisors (see below), whose sum is σ = 979725780. Its totient is φ = 261260200.

The previous prime is 522520403. The next prime is 522520423. The reversal of 522520408 is 804025225.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522520403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32657518 + ... + 32657533.

Almost surely, 2^522520408 is an apocalyptic number.

It is an amenable number.

522520408 is a deficient number, since it is larger than the sum of its proper divisors (457205372).

522520408 is a wasteful number, since it uses less digits than its factorization.

522520408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65315057 (or 65315053 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 522520408 is about 22858.7053001696. The cubic root of 522520408 is about 805.4422723032.

The spelling of 522520408 in words is "five hundred twenty-two million, five hundred twenty thousand, four hundred eight".