637252890 has 16 divisors (see below), whose sum is σ = 1529407008. Its totient is φ = 169934096.

The previous prime is 637252877. The next prime is 637252919. The reversal of 637252890 is 98252736.

It is a Curzon 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, 10620852 + ... + 10620911.

It is an arithmetic number, because the mean of its divisors is an integer number (95587938).

Almost surely, 2^637252890 is an apocalyptic number.

637252890 is an abundant number, since it is smaller than the sum of its proper divisors (892154118).

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

637252890 is a wasteful number, since it uses less digits than its factorization.

637252890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241773.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 637252890 is about 25243.8683644167. The cubic root of 637252890 is about 860.5390932215.

The spelling of 637252890 in words is "six hundred thirty-seven million, two hundred fifty-two thousand, eight hundred ninety".