631340428 has 6 divisors (see below), whose sum is σ = 1104845756. Its totient is φ = 315670212.

The previous prime is 631340419. The next prime is 631340447. The reversal of 631340428 is 824043136.

631340428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 631340428.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78917550 + ... + 78917557.

Almost surely, 2^631340428 is an apocalyptic number.

It is an amenable number.

631340428 is a deficient number, since it is larger than the sum of its proper divisors (473505328).

631340428 is a wasteful number, since it uses less digits than its factorization.

631340428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157835111 (or 157835109 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 631340428 is about 25126.4885728189. The cubic root of 631340428 is about 857.8694458164.

The spelling of 631340428 in words is "six hundred thirty-one million, three hundred forty thousand, four hundred twenty-eight".