28477688 has 8 divisors (see below), whose sum is σ = 53395680. Its totient is φ = 14238840.

The previous prime is 28477651. The next prime is 28477693. The reversal of 28477688 is 88677482.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1779848 + ... + 1779863.

It is an arithmetic number, because the mean of its divisors is an integer number (6674460).

Almost surely, 2^28477688 is an apocalyptic number.

It is an amenable number.

28477688 is a deficient number, since it is larger than the sum of its proper divisors (24917992).

28477688 is a wasteful number, since it uses less digits than its factorization.

28477688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559717 (or 3559713 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 50.

The square root of 28477688 is about 5336.4490065961. The cubic root of 28477688 is about 305.3760049606.

The spelling of 28477688 in words is "twenty-eight million, four hundred seventy-seven thousand, six hundred eighty-eight".