28625920 has 44 divisors (see below), whose sum is σ = 68680944. Its totient is φ = 11448320.

The previous prime is 28625899. The next prime is 28625921. The reversal of 28625920 is 2952682.

It is not an unprimeable number, because it can be changed into a prime (28625921) 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, 2325 + ... + 7915.

Almost surely, 2^28625920 is an apocalyptic number.

28625920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28625920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34340472).

28625920 is an abundant number, since it is smaller than the sum of its proper divisors (40055024).

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

28625920 is an equidigital number, since it uses as much as digits as its factorization.

28625920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616 (or 5598 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28625920 is about 5350.3196166210. The cubic root of 28625920 is about 305.9049357964.

The spelling of 28625920 in words is "twenty-eight million, six hundred twenty-five thousand, nine hundred twenty".