3128631 has 16 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 1877120.

The previous prime is 3128623. The next prime is 3128633. The reversal of 3128631 is 1368213.

It is a cyclic number.

It is not a de Polignac number, because 3128631 - 2³ = 3128623 is a prime.

It is a super-2 number, since 2×3128631² = 19576663868322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3128633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3310 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^3128631 is an apocalyptic number.

3128631 is a deficient number, since it is larger than the sum of its proper divisors (1467849).

3128631 is a wasteful number, since it uses less digits than its factorization.

3128631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966.

The product of its digits is 864, while the sum is 24.

The square root of 3128631 is about 1768.7936567050. The cubic root of 3128631 is about 146.2574895719.

The spelling of 3128631 in words is "three million, one hundred twenty-eight thousand, six hundred thirty-one".