28670056 has 8 divisors (see below), whose sum is σ = 53756370. Its totient is φ = 14335024.

The previous prime is 28670023. The next prime is 28670063. The reversal of 28670056 is 65007682.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 2353156 = 5130^2 + 1534^2 .

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

It is a super-2 number, since 2×28670056² = 1643944222086272, which contains 22 as substring.

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, 1791871 + ... + 1791886.

Almost surely, 2^28670056 is an apocalyptic number.

It is an amenable number.

28670056 is a deficient number, since it is larger than the sum of its proper divisors (25086314).

28670056 is a wasteful number, since it uses less digits than its factorization.

28670056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583763 (or 3583759 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 28670056 is about 5354.4426413960. The cubic root of 28670056 is about 306.0620717914.

The spelling of 28670056 in words is "twenty-eight million, six hundred seventy thousand, fifty-six".