28979586 has 32 divisors (see below), whose sum is σ = 67201920. Its totient is φ = 9239472.

The previous prime is 28979569. The next prime is 28979591. The reversal of 28979586 is 68597982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 10425 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (2100060).

Almost surely, 2^28979586 is an apocalyptic number.

28979586 is an abundant number, since it is smaller than the sum of its proper divisors (38222334).

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

28979586 is a wasteful number, since it uses less digits than its factorization.

28979586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23367 (or 23361 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 28979586 is about 5383.2690811439. The cubic root of 28979586 is about 307.1595756745.

The spelling of 28979586 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred eighty-six".