522261440 has 56 divisors (see below), whose sum is σ = 1247070912. Its totient is φ = 208327680.

The previous prime is 522261413. The next prime is 522261457. The reversal of 522261440 is 44162225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124985 + ... + 129095.

Almost surely, 2^522261440 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 522261440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623535456).

522261440 is an abundant number, since it is smaller than the sum of its proper divisors (724809472).

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

522261440 is a wasteful number, since it uses less digits than its factorization.

522261440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525 (or 4515 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 522261440 is about 22853.0400603508. The cubic root of 522261440 is about 805.3091877132.

The spelling of 522261440 in words is "five hundred twenty-two million, two hundred sixty-one thousand, four hundred forty".