28789156 has 24 divisors (see below), whose sum is σ = 55720224. Its totient is φ = 12905280.

The previous prime is 28789153. The next prime is 28789183. The reversal of 28789156 is 65198782.

It is not an unprimeable number, because it can be changed into a prime (28789153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 7693.

It is an arithmetic number, because the mean of its divisors is an integer number (2321676).

Almost surely, 2^28789156 is an apocalyptic number.

It is an amenable number.

28789156 is a deficient number, since it is larger than the sum of its proper divisors (26931068).

28789156 is a wasteful number, since it uses less digits than its factorization.

28789156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051 (or 9049 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 28789156 is about 5365.5527208294. The cubic root of 28789156 is about 306.4852965562.

The spelling of 28789156 in words is "twenty-eight million, seven hundred eighty-nine thousand, one hundred fifty-six".