28758072 has 32 divisors (see below), whose sum is σ = 82166400. Its totient is φ = 8216544.

The previous prime is 28758071. The next prime is 28758083. The reversal of 28758072 is 27085782.

It is a self number, because there is not a number n which added to its sum of digits gives 28758072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758071) 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, 85422 + ... + 85757.

It is an arithmetic number, because the mean of its divisors is an integer number (2567700).

Almost surely, 2^28758072 is an apocalyptic number.

It is an amenable number.

28758072 is an abundant number, since it is smaller than the sum of its proper divisors (53408328).

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

28758072 is a wasteful number, since it uses less digits than its factorization.

28758072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171195 (or 171191 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 28758072 is about 5362.6553124362. The cubic root of 28758072 is about 306.3749515389.

The spelling of 28758072 in words is "twenty-eight million, seven hundred fifty-eight thousand, seventy-two".