28712370 has 32 divisors (see below), whose sum is σ = 70774848. Its totient is φ = 7449408.

The previous prime is 28712353. The next prime is 28712377. The reversal of 28712370 is 7321782.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28712377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11824 + ... + 14043.

It is an arithmetic number, because the mean of its divisors is an integer number (2211714).

Almost surely, 2^28712370 is an apocalyptic number.

28712370 is an abundant number, since it is smaller than the sum of its proper divisors (42062478).

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

28712370 is a wasteful number, since it uses less digits than its factorization.

28712370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25914.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28712370 is about 5358.3924828254. The cubic root of 28712370 is about 306.2125696306.

The spelling of 28712370 in words is "twenty-eight million, seven hundred twelve thousand, three hundred seventy".