28104056 has 8 divisors (see below), whose sum is σ = 52695120. Its totient is φ = 14052024.

The previous prime is 28104047. The next prime is 28104107. The reversal of 28104056 is 65040182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28104056² = 1579675927302272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1756496 + ... + 1756511.

It is an arithmetic number, because the mean of its divisors is an integer number (6586890).

Almost surely, 2^28104056 is an apocalyptic number.

It is an amenable number.

28104056 is a deficient number, since it is larger than the sum of its proper divisors (24591064).

28104056 is a wasteful number, since it uses less digits than its factorization.

28104056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513013 (or 3513009 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28104056 is about 5301.3258718928. The cubic root of 28104056 is about 304.0345932471.

The spelling of 28104056 in words is "twenty-eight million, one hundred four thousand, fifty-six".