28651512 has 32 divisors (see below), whose sum is σ = 71787600. Its totient is φ = 9529344.

The previous prime is 28651457. The next prime is 28651531. The reversal of 28651512 is 21515682.

It is a super-2 number, since 2×28651512² = 1641818279772288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28651512.

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, 12814 + ... + 14882.

Almost surely, 2^28651512 is an apocalyptic number.

It is an amenable number.

28651512 is an abundant number, since it is smaller than the sum of its proper divisors (43136088).

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

28651512 is a wasteful number, since it uses less digits than its factorization.

28651512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2651 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 28651512 is about 5352.7107151424. The cubic root of 28651512 is about 305.9960698372.

The spelling of 28651512 in words is "twenty-eight million, six hundred fifty-one thousand, five hundred twelve".