28739658 has 16 divisors (see below), whose sum is σ = 57550176. Its totient is φ = 9568080.

The previous prime is 28739617. The next prime is 28739681. The reversal of 28739658 is 85693782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360 + ... + 8292.

It is an arithmetic number, because the mean of its divisors is an integer number (3596886).

Almost surely, 2^28739658 is an apocalyptic number.

28739658 is an abundant number, since it is smaller than the sum of its proper divisors (28810518).

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

28739658 is a wasteful number, since it uses less digits than its factorization.

28739658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its digits is 725760, while the sum is 48.

The square root of 28739658 is about 5360.9381641649. The cubic root of 28739658 is about 306.3095462166.

The spelling of 28739658 in words is "twenty-eight million, seven hundred thirty-nine thousand, six hundred fifty-eight".