28501860 has 48 divisors (see below), whose sum is σ = 84502656. Its totient is φ = 7153152.

The previous prime is 28501841. The next prime is 28501871. The reversal of 28501860 is 6810582.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12952 + ... + 14991.

It is an arithmetic number, because the mean of its divisors is an integer number (1760472).

Almost surely, 2^28501860 is an apocalyptic number.

28501860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28501860 is an abundant number, since it is smaller than the sum of its proper divisors (56000796).

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

28501860 is a wasteful number, since it uses less digits than its factorization.

28501860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27972 (or 27970 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 28501860 is about 5338.7133281344. The cubic root of 28501860 is about 305.4623820719.

The spelling of 28501860 in words is "twenty-eight million, five hundred one thousand, eight hundred sixty".