637868052 has 18 divisors (see below), whose sum is σ = 1612388778. Its totient is φ = 212622672.

The previous prime is 637868029. The next prime is 637868071. The reversal of 637868052 is 250868736.

637868052 is a `hidden beast` number, since 637 + 8 + 6 + 8 + 0 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 523677456 + 114190596 = 22884^2 + 10686^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 637867989 and 637868007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8859243 + ... + 8859314.

Almost surely, 2^637868052 is an apocalyptic number.

It is an amenable number.

637868052 is an abundant number, since it is smaller than the sum of its proper divisors (974520726).

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

637868052 is a wasteful number, since it uses less digits than its factorization.

637868052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17718567 (or 17718562 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 637868052 is about 25256.0498098970. The cubic root of 637868052 is about 860.8159067698.

The spelling of 637868052 in words is "six hundred thirty-seven million, eight hundred sixty-eight thousand, fifty-two".