28631394 has 40 divisors (see below), whose sum is σ = 69992208. Its totient is φ = 8675640.

The previous prime is 28631353. The next prime is 28631401. The reversal of 28631394 is 49313682.

It is a super-3 number, since 3×28631394³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6252 + ... + 9815.

Almost surely, 2^28631394 is an apocalyptic number.

28631394 is an abundant number, since it is smaller than the sum of its proper divisors (41360814).

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

28631394 is a wasteful number, since it uses less digits than its factorization.

28631394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16092 (or 16083 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 28631394 is about 5350.8311503915. The cubic root of 28631394 is about 305.9244334742.

The spelling of 28631394 in words is "twenty-eight million, six hundred thirty-one thousand, three hundred ninety-four".