28479407 has 8 divisors (see below), whose sum is σ = 31326672. Its totient is φ = 25889160.

The previous prime is 28479401. The next prime is 28479431. The reversal of 28479407 is 70497482.

It is not a de Polignac number, because 28479407 - 2⁶ = 28479343 is a prime.

It is a super-2 number, since 2×28479407² = 1622153246143298, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 9368 + ... + 12029.

It is an arithmetic number, because the mean of its divisors is an integer number (3915834).

Almost surely, 2^28479407 is an apocalyptic number.

28479407 is a deficient number, since it is larger than the sum of its proper divisors (2847265).

28479407 is an equidigital number, since it uses as much as digits as its factorization.

28479407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21430 (or 21408 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28479407 is about 5336.6100663249. The cubic root of 28479407 is about 305.3821493123.

The spelling of 28479407 in words is "twenty-eight million, four hundred seventy-nine thousand, four hundred seven".