28894656 has 56 divisors (see below), whose sum is σ = 87376000. Its totient is φ = 8255232.

The previous prime is 28894639. The next prime is 28894661. The reversal of 28894656 is 65649882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×28894656² = 1669802290716672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9406 + ... + 12093.

Almost surely, 2^28894656 is an apocalyptic number.

It is an amenable number.

28894656 is an abundant number, since it is smaller than the sum of its proper divisors (58481344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28894656 is a wasteful number, since it uses less digits than its factorization.

28894656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21521 (or 21511 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 28894656 is about 5375.3749636653. The cubic root of 28894656 is about 306.8592195474.

The spelling of 28894656 in words is "twenty-eight million, eight hundred ninety-four thousand, six hundred fifty-six".