637720098 has 16 divisors (see below), whose sum is σ = 1288590240. Its totient is φ = 210381696.

The previous prime is 637720093. The next prime is 637720163. The reversal of 637720098 is 890027736.

It is not an unprimeable number, because it can be changed into a prime (637720091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547288 + ... + 548451.

It is an arithmetic number, because the mean of its divisors is an integer number (80536890).

Almost surely, 2^637720098 is an apocalyptic number.

637720098 is an abundant number, since it is smaller than the sum of its proper divisors (650870142).

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

637720098 is a wasteful number, since it uses less digits than its factorization.

637720098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095841.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 637720098 is about 25253.1205596457. The cubic root of 637720098 is about 860.7493459794.

The spelling of 637720098 in words is "six hundred thirty-seven million, seven hundred twenty thousand, ninety-eight".