28537713 has 24 divisors (see below), whose sum is σ = 43849728. Its totient is φ = 17822592.

The previous prime is 28537709. The next prime is 28537739. The reversal of 28537713 is 31773582.

28537713 is a `hidden beast` number, since 285 + 377 + 1 + 3 = 666.

It is not a de Polignac number, because 28537713 - 2² = 28537709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28537783) 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, 58356 + ... + 58842.

It is an arithmetic number, because the mean of its divisors is an integer number (1827072).

Almost surely, 2^28537713 is an apocalyptic number.

It is an amenable number.

28537713 is a deficient number, since it is larger than the sum of its proper divisors (15312015).

28537713 is a wasteful number, since it uses less digits than its factorization.

28537713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 890 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 28537713 is about 5342.0701043697. The cubic root of 28537713 is about 305.5904106036.

It can be divided in two parts, 285377 and 13, that added together give a triangular number (285390 = T₇₅₅).

The spelling of 28537713 in words is "twenty-eight million, five hundred thirty-seven thousand, seven hundred thirteen".