3131428 has 12 divisors (see below), whose sum is σ = 5768560. Its totient is φ = 1483272.

The previous prime is 3131419. The next prime is 3131431. The reversal of 3131428 is 8241313.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3131399 and 3131408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20526 + ... + 20677.

Almost surely, 2^3131428 is an apocalyptic number.

3131428 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3131428 is a deficient number, since it is larger than the sum of its proper divisors (2637132).

3131428 is a wasteful number, since it uses less digits than its factorization.

3131428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41226 (or 41224 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 3131428 is about 1769.5841319361. The cubic root of 3131428 is about 146.3010613825.

The spelling of 3131428 in words is "three million, one hundred thirty-one thousand, four hundred twenty-eight".