28785113 has 8 divisors (see below), whose sum is σ = 32929728. Its totient is φ = 24648624.

The previous prime is 28785091. The next prime is 28785179. The reversal of 28785113 is 31158782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28785113 - 2¹⁸ = 28522969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28785193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12995 + ... + 15047.

It is an arithmetic number, because the mean of its divisors is an integer number (4116216).

Almost surely, 2^28785113 is an apocalyptic number.

It is an amenable number.

28785113 is a deficient number, since it is larger than the sum of its proper divisors (4144615).

28785113 is a wasteful number, since it uses less digits than its factorization.

28785113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063.

The product of its digits is 13440, while the sum is 35.

The square root of 28785113 is about 5365.1759523803. The cubic root of 28785113 is about 306.4709488152.

Subtracting from 28785113 its sum of digits (35), we obtain a triangular number (28785078 = T₇₅₈₇).

The spelling of 28785113 in words is "twenty-eight million, seven hundred eighty-five thousand, one hundred thirteen".