28986738 has 32 divisors (see below), whose sum is σ = 63590400. Its totient is φ = 8735760.

The previous prime is 28986721. The next prime is 28986743. The reversal of 28986738 is 83768982.

It is a Curzon number.

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, 12031 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (1987200).

Almost surely, 2^28986738 is an apocalyptic number.

28986738 is an abundant number, since it is smaller than the sum of its proper divisors (34603662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28986738 is a wasteful number, since it uses less digits than its factorization.

28986738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422.

The product of its digits is 1161216, while the sum is 51.

The square root of 28986738 is about 5383.9333205381. The cubic root of 28986738 is about 307.1848420187.

The spelling of 28986738 in words is "twenty-eight million, nine hundred eighty-six thousand, seven hundred thirty-eight".