28979005 has 32 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 20160000.

The previous prime is 28978993. The next prime is 28979051. The reversal of 28979005 is 50097982.

It is not a de Polignac number, because 28979005 - 2⁵ = 28978973 is a prime.

It is a super-3 number, since 3×28979005³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160015 + ... + 160195.

It is an arithmetic number, because the mean of its divisors is an integer number (1238328).

Almost surely, 2^28979005 is an apocalyptic number.

It is an amenable number.

28979005 is a deficient number, since it is larger than the sum of its proper divisors (10647491).

28979005 is a wasteful number, since it uses less digits than its factorization.

28979005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 28979005 is about 5383.2151173811. The cubic root of 28979005 is about 307.1575229547.

The spelling of 28979005 in words is "twenty-eight million, nine hundred seventy-nine thousand, five".