631778472 has 48 divisors (see below), whose sum is σ = 1842689940. Its totient is φ = 194393088.

The previous prime is 631778461. The next prime is 631778479. The reversal of 631778472 is 274877136.

631778472 is a `hidden beast` number, since 6 + 3 + 177 + 8 + 472 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 631717956 + 60516 = 25134^2 + 246^2 .

It is not an unprimeable number, because it can be changed into a prime (631778479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336553 + ... + 338424.

Almost surely, 2^631778472 is an apocalyptic number.

It is an amenable number.

631778472 is an abundant number, since it is smaller than the sum of its proper divisors (1210911468).

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

631778472 is a wasteful number, since it uses less digits than its factorization.

631778472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675002 (or 674995 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 631778472 is about 25135.2038384414. The cubic root of 631778472 is about 858.0678056183.

It can be divided in two parts, 631778 and 472, that added together give a triangular number (632250 = T₁₁₂₄).

The spelling of 631778472 in words is "six hundred thirty-one million, seven hundred seventy-eight thousand, four hundred seventy-two".