28611656 has 16 divisors (see below), whose sum is σ = 55097340. Its totient is φ = 13919040.

The previous prime is 28611601. The next prime is 28611659. The reversal of 28611656 is 65611682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23367556 + 5244100 = 4834^2 + 2290^2 .

It is not an unprimeable number, because it can be changed into a prime (28611659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48035 + ... + 48626.

Almost surely, 2^28611656 is an apocalyptic number.

It is an amenable number.

28611656 is a deficient number, since it is larger than the sum of its proper divisors (26485684).

28611656 is a wasteful number, since it uses less digits than its factorization.

28611656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96704 (or 96700 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 28611656 is about 5348.9864460475. The cubic root of 28611656 is about 305.8541175991.

The spelling of 28611656 in words is "twenty-eight million, six hundred eleven thousand, six hundred fifty-six".