28156748 has 6 divisors (see below), whose sum is σ = 49274316. Its totient is φ = 14078372.

The previous prime is 28156721. The next prime is 28156763. The reversal of 28156748 is 84765182.

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 as a sum of consecutive naturals, namely, 3519590 + ... + 3519597.

It is an arithmetic number, because the mean of its divisors is an integer number (8212386).

Almost surely, 2^28156748 is an apocalyptic number.

It is an amenable number.

28156748 is a deficient number, since it is larger than the sum of its proper divisors (21117568).

28156748 is a wasteful number, since it uses less digits than its factorization.

28156748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7039191 (or 7039189 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 28156748 is about 5306.2932448179. The cubic root of 28156748 is about 304.2244850451.

The spelling of 28156748 in words is "twenty-eight million, one hundred fifty-six thousand, seven hundred forty-eight".