28979599 has 4 divisors (see below), whose sum is σ = 31614120. Its totient is φ = 26345080.

The previous prime is 28979597. The next prime is 28979647. The reversal of 28979599 is 99597982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28979599 - 2¹ = 28979597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317244 + ... + 1317265.

It is an arithmetic number, because the mean of its divisors is an integer number (7903530).

Almost surely, 2^28979599 is an apocalyptic number.

28979599 is a deficient number, since it is larger than the sum of its proper divisors (2634521).

28979599 is a wasteful number, since it uses less digits than its factorization.

28979599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634520.

The product of its digits is 3674160, while the sum is 58.

The square root of 28979599 is about 5383.2702885885. The cubic root of 28979599 is about 307.1596216042.

The spelling of 28979599 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred ninety-nine".