28682731 has 16 divisors (see below), whose sum is σ = 36034560. Its totient is φ = 22178880.

The previous prime is 28682713. The next prime is 28682777. The reversal of 28682731 is 13728682.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28682731 is a prime.

It is a super-2 number, since 2×28682731² = 1645398115236722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28682701) 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, 9190 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (2252160).

Almost surely, 2^28682731 is an apocalyptic number.

28682731 is a deficient number, since it is larger than the sum of its proper divisors (7351829).

28682731 is a wasteful number, since it uses less digits than its factorization.

28682731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874.

The product of its digits is 32256, while the sum is 37.

The square root of 28682731 is about 5355.6261071886. The cubic root of 28682731 is about 306.1071683807.

The spelling of 28682731 in words is "twenty-eight million, six hundred eighty-two thousand, seven hundred thirty-one".