28479405 has 16 divisors (see below), whose sum is σ = 47548800. Its totient is φ = 14528448.

The previous prime is 28479401. The next prime is 28479431. The reversal of 28479405 is 50497482.

It is not a de Polignac number, because 28479405 - 2² = 28479401 is a prime.

It is a super-2 number, since 2×28479405² = 1622153018308050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28479401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40930 + ... + 41619.

It is an arithmetic number, because the mean of its divisors is an integer number (2971800).

Almost surely, 2^28479405 is an apocalyptic number.

It is an amenable number.

28479405 is a deficient number, since it is larger than the sum of its proper divisors (19069395).

28479405 is a wasteful number, since it uses less digits than its factorization.

28479405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82580.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28479405 is about 5336.6098789400. The cubic root of 28479405 is about 305.3821421637.

The spelling of 28479405 in words is "twenty-eight million, four hundred seventy-nine thousand, four hundred five".