520644342 has 32 divisors (see below), whose sum is σ = 1051142400. Its totient is φ = 171913248.

The previous prime is 520644323. The next prime is 520644361. The reversal of 520644342 is 243446025.

It is an interprime number because it is at equal distance from previous prime (520644323) and next prime (520644361).

It is a super-2 number, since 2×520644342² = 542141061713225928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412909 + ... + 414167.

It is an arithmetic number, because the mean of its divisors is an integer number (32848200).

Almost surely, 2^520644342 is an apocalyptic number.

520644342 is an abundant number, since it is smaller than the sum of its proper divisors (530498058).

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

520644342 is a wasteful number, since it uses less digits than its factorization.

520644342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 520644342 is about 22817.6322610388. The cubic root of 520644342 is about 804.4771585308.

The spelling of 520644342 in words is "five hundred twenty million, six hundred forty-four thousand, three hundred forty-two".