631111404 has 48 divisors (see below), whose sum is σ = 1835963136. Its totient is φ = 163924800.

The previous prime is 631111381. The next prime is 631111409. The reversal of 631111404 is 404111136.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (631111409) 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, 340587 + ... + 342434.

It is an arithmetic number, because the mean of its divisors is an integer number (38249232).

Almost surely, 2^631111404 is an apocalyptic number.

It is an amenable number.

631111404 is an abundant number, since it is smaller than the sum of its proper divisors (1204851732).

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

631111404 is a wasteful number, since it uses less digits than its factorization.

631111404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683046 (or 683044 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 631111404 is about 25121.9307379031. The cubic root of 631111404 is about 857.7657001744.

The spelling of 631111404 in words is "six hundred thirty-one million, one hundred eleven thousand, four hundred four".