28776164 has 6 divisors (see below), whose sum is σ = 50358294. Its totient is φ = 14388080.

The previous prime is 28776157. The next prime is 28776193. The reversal of 28776164 is 46167782.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 153664 = 5350^2 + 392^2 .

It is a super-2 number, since 2×28776164² = 1656135229109792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3597017 + ... + 3597024.

It is an arithmetic number, because the mean of its divisors is an integer number (8393049).

Almost surely, 2^28776164 is an apocalyptic number.

It is an amenable number.

28776164 is a deficient number, since it is larger than the sum of its proper divisors (21582130).

28776164 is a wasteful number, since it uses less digits than its factorization.

28776164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194045 (or 7194043 counting only the distinct ones).

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

The square root of 28776164 is about 5364.3418981269. The cubic root of 28776164 is about 306.4391859523.

The spelling of 28776164 in words is "twenty-eight million, seven hundred seventy-six thousand, one hundred sixty-four".