631974285 has 16 divisors (see below), whose sum is σ = 1123510080. Its totient is φ = 337052880.

The previous prime is 631974283. The next prime is 631974307. The reversal of 631974285 is 582479136.

631974285 is a `hidden beast` number, since 631 + 9 + 7 + 4 + 2 + 8 + 5 = 666.

631974285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631974285 - 2¹ = 631974283 is a prime.

It is a super-2 number, since 2×631974285² = 798782993802522450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 631974285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631974281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2340511 + ... + 2340780.

It is an arithmetic number, because the mean of its divisors is an integer number (70219380).

Almost surely, 2^631974285 is an apocalyptic number.

It is an amenable number.

631974285 is a deficient number, since it is larger than the sum of its proper divisors (491535795).

631974285 is a wasteful number, since it uses less digits than its factorization.

631974285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681305 (or 4681299 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 631974285 is about 25139.0987308615. The cubic root of 631974285 is about 858.1564461164.

The spelling of 631974285 in words is "six hundred thirty-one million, nine hundred seventy-four thousand, two hundred eighty-five".