31963428 has 36 divisors (see below), whose sum is σ = 92339520. Its totient is φ = 9132336.

The previous prime is 31963411. The next prime is 31963483. The reversal of 31963428 is 82436913.

31963428 is a `hidden beast` number, since 3 + 19 + 634 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31963428² = 2043321459022368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 31963392 and 31963401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63168 + ... + 63671.

Almost surely, 2^31963428 is an apocalyptic number.

It is an amenable number.

31963428 is an abundant number, since it is smaller than the sum of its proper divisors (60376092).

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

31963428 is a wasteful number, since it uses less digits than its factorization.

31963428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126856 (or 126851 counting only the distinct ones).

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

The square root of 31963428 is about 5653.6207867171. The cubic root of 31963428 is about 317.3592175569.

The spelling of 31963428 in words is "thirty-one million, nine hundred sixty-three thousand, four hundred twenty-eight".