28750680 has 128 divisors (see below), whose sum is σ = 109555200. Its totient is φ = 6569856.

The previous prime is 28750679. The next prime is 28750727. The reversal of 28750680 is 8605782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5659 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (855900).

Almost surely, 2^28750680 is an apocalyptic number.

28750680 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 28750680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54777600).

28750680 is an abundant number, since it is smaller than the sum of its proper divisors (80804520).

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

28750680 is a wasteful number, since it uses less digits than its factorization.

28750680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830 (or 3820 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28750680 is about 5361.9660573338. The cubic root of 28750680 is about 306.3486989942.

The spelling of 28750680 in words is "twenty-eight million, seven hundred fifty thousand, six hundred eighty".