631694420 has 24 divisors (see below), whose sum is σ = 1516066944. Its totient is φ = 216580896.

The previous prime is 631694419. The next prime is 631694423. The reversal of 631694420 is 24496136.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631694423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255912 + ... + 2256191.

It is an arithmetic number, because the mean of its divisors is an integer number (63169456).

Almost surely, 2^631694420 is an apocalyptic number.

It is an amenable number.

631694420 is an abundant number, since it is smaller than the sum of its proper divisors (884372524).

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

631694420 is a wasteful number, since it uses less digits than its factorization.

631694420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512119 (or 4512117 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 631694420 is about 25133.5317852466. The cubic root of 631694420 is about 858.0297513967.

The spelling of 631694420 in words is "six hundred thirty-one million, six hundred ninety-four thousand, four hundred twenty".