28657534 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 14143864.

The previous prime is 28657513. The next prime is 28657543. The reversal of 28657534 is 43575682.

It is a super-2 number, since 2×28657534² = 1642508509922312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79647 + ... + 80005.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28657534 is an apocalyptic number.

28657534 is a deficient number, since it is larger than the sum of its proper divisors (14888066).

28657534 is a wasteful number, since it uses less digits than its factorization.

28657534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 201600, while the sum is 40.

The square root of 28657534 is about 5353.2732043115. The cubic root of 28657534 is about 306.0175065098.

The spelling of 28657534 in words is "twenty-eight million, six hundred fifty-seven thousand, five hundred thirty-four".