28758116 has 12 divisors (see below), whose sum is σ = 50455020. Its totient is φ = 14342400.

The previous prime is 28758113. The next prime is 28758137. The reversal of 28758116 is 61185782.

It can be written as a sum of positive squares in 2 ways, for example, as 24049216 + 4708900 = 4904^2 + 2170^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28758116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7361 + ... + 10568.

It is an arithmetic number, because the mean of its divisors is an integer number (4204585).

Almost surely, 2^28758116 is an apocalyptic number.

It is an amenable number.

28758116 is a deficient number, since it is larger than the sum of its proper divisors (21696904).

28758116 is a wasteful number, since it uses less digits than its factorization.

28758116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18334 (or 18332 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 28758116 is about 5362.6594148799. The cubic root of 28758116 is about 306.3751077906.

The spelling of 28758116 in words is "twenty-eight million, seven hundred fifty-eight thousand, one hundred sixteen".