28860538 has 32 divisors (see below), whose sum is σ = 52752384. Its totient is φ = 11573232.

The previous prime is 28860529. The next prime is 28860541. The reversal of 28860538 is 83506882.

It is a self number, because there is not a number n which added to its sum of digits gives 28860538.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14181 + ... + 16087.

It is an arithmetic number, because the mean of its divisors is an integer number (1648512).

Almost surely, 2^28860538 is an apocalyptic number.

28860538 is a deficient number, since it is larger than the sum of its proper divisors (23891846).

28860538 is a wasteful number, since it uses less digits than its factorization.

28860538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28860538 is about 5372.2004802502. The cubic root of 28860538 is about 306.7383950574.

The spelling of 28860538 in words is "twenty-eight million, eight hundred sixty thousand, five hundred thirty-eight".