28877764 has 24 divisors (see below), whose sum is σ = 53712288. Its totient is φ = 13537920.

The previous prime is 28877753. The next prime is 28877809. The reversal of 28877764 is 46777882.

It is a happy 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, 21867 + ... + 23149.

It is an arithmetic number, because the mean of its divisors is an integer number (2238012).

Almost surely, 2^28877764 is an apocalyptic number.

It is an amenable number.

28877764 is a deficient number, since it is larger than the sum of its proper divisors (24834524).

28877764 is a wasteful number, since it uses less digits than its factorization.

28877764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1633 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 49.

The square root of 28877764 is about 5373.8034947326. The cubic root of 28877764 is about 306.7994106060.

The spelling of 28877764 in words is "twenty-eight million, eight hundred seventy-seven thousand, seven hundred sixty-four".