521942792 has 64 divisors (see below), whose sum is σ = 1165449600. Its totient is φ = 214479360.

The previous prime is 521942791. The next prime is 521942801. The reversal of 521942792 is 297249125.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (521942791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133538 + ... + 137390.

It is an arithmetic number, because the mean of its divisors is an integer number (18210150).

Almost surely, 2^521942792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521942792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582724800).

521942792 is an abundant number, since it is smaller than the sum of its proper divisors (643506808).

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

521942792 is a wasteful number, since it uses less digits than its factorization.

521942792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966 (or 3962 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 521942792 is about 22846.0673202195. The cubic root of 521942792 is about 805.1453729717.

The spelling of 521942792 in words is "five hundred twenty-one million, nine hundred forty-two thousand, seven hundred ninety-two".