646038560 has 24 divisors (see below), whose sum is σ = 1526266476. Its totient is φ = 258415360.

The previous prime is 646038553. The next prime is 646038563. The reversal of 646038560 is 65830646.

It can be written as a sum of positive squares in 2 ways, for example, as 593214736 + 52823824 = 24356^2 + 7268^2 .

It is not an unprimeable number, because it can be changed into a prime (646038563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018711 + ... + 2019030.

Almost surely, 2^646038560 is an apocalyptic number.

It is an amenable number.

646038560 is an abundant number, since it is smaller than the sum of its proper divisors (880227916).

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

646038560 is a wasteful number, since it uses less digits than its factorization.

646038560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037756 (or 4037748 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 646038560 is about 25417.2886044125. The cubic root of 646038560 is about 864.4757467921.

The spelling of 646038560 in words is "six hundred forty-six million, thirty-eight thousand, five hundred sixty".