28929765 has 32 divisors (see below), whose sum is σ = 47698560. Its totient is φ = 14966784.

The previous prime is 28929757. The next prime is 28929779. The reversal of 28929765 is 56792982.

It is not a de Polignac number, because 28929765 - 2³ = 28929757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85677 + ... + 86013.

It is an arithmetic number, because the mean of its divisors is an integer number (1490580).

Almost surely, 2^28929765 is an apocalyptic number.

It is an amenable number.

28929765 is a deficient number, since it is larger than the sum of its proper divisors (18768795).

28929765 is a wasteful number, since it uses less digits than its factorization.

28929765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 544320, while the sum is 48.

The square root of 28929765 is about 5378.6396979162. The cubic root of 28929765 is about 306.9834542820.

The spelling of 28929765 in words is "twenty-eight million, nine hundred twenty-nine thousand, seven hundred sixty-five".