28878752 has 24 divisors (see below), whose sum is σ = 64977696. Its totient is φ = 12376512.

The previous prime is 28878749. The next prime is 28878761. The reversal of 28878752 is 25787882.

It is a junction number, because it is equal to n+sod(n) for n = 28878697 and 28878706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64238 + ... + 64685.

It is an arithmetic number, because the mean of its divisors is an integer number (2707404).

Almost surely, 2^28878752 is an apocalyptic number.

It is an amenable number.

28878752 is an abundant number, since it is smaller than the sum of its proper divisors (36098944).

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

28878752 is a wasteful number, since it uses less digits than its factorization.

28878752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128940 (or 128932 counting only the distinct ones).

The product of its digits is 501760, while the sum is 47.

The square root of 28878752 is about 5373.8954213866. The cubic root of 28878752 is about 306.8029094268.

The spelling of 28878752 in words is "twenty-eight million, eight hundred seventy-eight thousand, seven hundred fifty-two".