28979559 has 32 divisors (see below), whose sum is σ = 49559040. Its totient is φ = 16393536.

The previous prime is 28979551. The next prime is 28979567. The reversal of 28979559 is 95597982.

28979559 is a `hidden beast` number, since 2 + 89 + 7 + 9 + 559 = 666.

It is an interprime number because it is at equal distance from previous prime (28979551) and next prime (28979567).

It is not a de Polignac number, because 28979559 - 2³ = 28979551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19507 + ... + 20939.

It is an arithmetic number, because the mean of its divisors is an integer number (1548720).

Almost surely, 2^28979559 is an apocalyptic number.

28979559 is a deficient number, since it is larger than the sum of its proper divisors (20579481).

28979559 is a wasteful number, since it uses less digits than its factorization.

28979559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1550 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 28979559 is about 5383.2665733735. The cubic root of 28979559 is about 307.1594802819.

The spelling of 28979559 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred fifty-nine".