637481232 has 160 divisors (see below), whose sum is σ = 1970588160. Its totient is φ = 196577280.

The previous prime is 637481231. The next prime is 637481237. The reversal of 637481232 is 232184736.

It is a happy number.

637481232 is a `hidden beast` number, since 637 + 4 + 8 + 12 + 3 + 2 = 666.

637481232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (637481231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447273 + ... + 448695.

It is an arithmetic number, because the mean of its divisors is an integer number (12316176).

Almost surely, 2^637481232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 637481232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985294080).

637481232 is an abundant number, since it is smaller than the sum of its proper divisors (1333106928).

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

637481232 is a wasteful number, since it uses less digits than its factorization.

637481232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1506 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 637481232 is about 25248.3906813880. The cubic root of 637481232 is about 860.6418644319.

It can be divided in two parts, 63748 and 1232, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 637481232 in words is "six hundred thirty-seven million, four hundred eighty-one thousand, two hundred thirty-two".