6372640 has 24 divisors (see below), whose sum is σ = 15055740. Its totient is φ = 2548992.

The previous prime is 6372623. The next prime is 6372647. The reversal of 6372640 is 462736.

It can be written as a sum of positive squares in 2 ways, for example, as 6130576 + 242064 = 2476^2 + 492^2 .

It is a super-2 number, since 2×6372640² = 81221081139200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6372599 and 6372608.

It is not an unprimeable number, because it can be changed into a prime (6372647) 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, 19755 + ... + 20074.

Almost surely, 2^6372640 is an apocalyptic number.

It is an amenable number.

6372640 is an abundant number, since it is smaller than the sum of its proper divisors (8683100).

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

6372640 is a wasteful number, since it uses less digits than its factorization.

6372640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39844 (or 39836 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 6372640 is about 2524.4088416895. The cubic root of 6372640 is about 185.3986048700.

The spelling of 6372640 in words is "six million, three hundred seventy-two thousand, six hundred forty".