28479178 has 32 divisors (see below), whose sum is σ = 52948224. Its totient is φ = 11187072.

The previous prime is 28479167. The next prime is 28479181. The reversal of 28479178 is 87197482.

It is a super-2 number, since 2×28479178² = 1622127159111368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29926 + ... + 30862.

It is an arithmetic number, because the mean of its divisors is an integer number (1654632).

Almost surely, 2^28479178 is an apocalyptic number.

28479178 is a deficient number, since it is larger than the sum of its proper divisors (24469046).

28479178 is a wasteful number, since it uses less digits than its factorization.

28479178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126.

The product of its digits is 225792, while the sum is 46.

The square root of 28479178 is about 5336.5886107138. The cubic root of 28479178 is about 305.3813307946.

The spelling of 28479178 in words is "twenty-eight million, four hundred seventy-nine thousand, one hundred seventy-eight".