28979501 has 4 divisors (see below), whose sum is σ = 29107392. Its totient is φ = 28851612.

The previous prime is 28979459. The next prime is 28979507. The reversal of 28979501 is 10597982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10597982 = 2 ⋅5298991.

It is a cyclic number.

It is not a de Polignac number, because 28979501 - 2⁶ = 28979437 is a prime.

It is a super-2 number, since 2×28979501² = 1679622956418002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63605 + ... + 64058.

It is an arithmetic number, because the mean of its divisors is an integer number (7276848).

Almost surely, 2^28979501 is an apocalyptic number.

It is an amenable number.

28979501 is a deficient number, since it is larger than the sum of its proper divisors (127891).

28979501 is a wasteful number, since it uses less digits than its factorization.

28979501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127890.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 28979501 is about 5383.2611863071. The cubic root of 28979501 is about 307.1592753643.

The spelling of 28979501 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred one".