637920052 has 24 divisors (see below), whose sum is σ = 1391826240. Its totient is φ = 248540160.

The previous prime is 637920043. The next prime is 637920061. The reversal of 637920052 is 250029736.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (637920043) and next prime (637920061).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035277 + ... + 1035892.

It is an arithmetic number, because the mean of its divisors is an integer number (57992760).

Almost surely, 2^637920052 is an apocalyptic number.

It is an amenable number.

637920052 is an abundant number, since it is smaller than the sum of its proper divisors (753906188).

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

637920052 is a wasteful number, since it uses less digits than its factorization.

637920052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071191 (or 2071189 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 637920052 is about 25257.0792452334. The cubic root of 637920052 is about 860.8392978200.

Adding to 637920052 its reverse (250029736), we get a palindrome (887949788).

The spelling of 637920052 in words is "six hundred thirty-seven million, nine hundred twenty thousand, fifty-two".