28775616 has 28 divisors (see below), whose sum is σ = 76135992. Its totient is φ = 9591808.

The previous prime is 28775597. The next prime is 28775653. The reversal of 28775616 is 61657782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74745 + ... + 75128.

Almost surely, 2^28775616 is an apocalyptic number.

It is an amenable number.

28775616 is an abundant number, since it is smaller than the sum of its proper divisors (47360376).

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

28775616 is a wasteful number, since it uses less digits than its factorization.

28775616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149888 (or 149878 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 28775616 is about 5364.2908198568. The cubic root of 28775616 is about 306.4372407111.

The spelling of 28775616 in words is "twenty-eight million, seven hundred seventy-five thousand, six hundred sixteen".