28607331 has 16 divisors (see below), whose sum is σ = 41898240. Its totient is φ = 17281440.

The previous prime is 28607329. The next prime is 28607339. The reversal of 28607331 is 13370682.

It is not a de Polignac number, because 28607331 - 2¹ = 28607329 is a prime.

It is a super-2 number, since 2×28607331² = 1636758773887122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28607339) 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, 9600 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (2618640).

Almost surely, 2^28607331 is an apocalyptic number.

28607331 is a deficient number, since it is larger than the sum of its proper divisors (13290909).

28607331 is a wasteful number, since it uses less digits than its factorization.

28607331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21866.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 28607331 is about 5348.5821485698. The cubic root of 28607331 is about 305.8387056318.

The spelling of 28607331 in words is "twenty-eight million, six hundred seven thousand, three hundred thirty-one".