28607031 has 24 divisors (see below), whose sum is σ = 42729024. Its totient is φ = 18429120.

The previous prime is 28607023. The next prime is 28607063. The reversal of 28607031 is 13070682.

28607031 is a `hidden beast` number, since 28 + 607 + 0 + 31 = 666.

It is not a de Polignac number, because 28607031 - 2³ = 28607023 is a prime.

It is a super-2 number, since 2×28607031² = 1636724445269922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28606986 and 28607004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28607071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90085 + ... + 90401.

It is an arithmetic number, because the mean of its divisors is an integer number (1780376).

Almost surely, 2^28607031 is an apocalyptic number.

28607031 is a deficient number, since it is larger than the sum of its proper divisors (14121993).

28607031 is a wasteful number, since it uses less digits than its factorization.

28607031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 28607031 is about 5348.5541036807. The cubic root of 28607031 is about 305.8376365360.

The spelling of 28607031 in words is "twenty-eight million, six hundred seven thousand, thirty-one".