28371580 has 12 divisors (see below), whose sum is σ = 59580360. Its totient is φ = 11348624.

The previous prime is 28371571. The next prime is 28371583. The reversal of 28371580 is 8517382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371583) 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, 709270 + ... + 709309.

It is an arithmetic number, because the mean of its divisors is an integer number (4965030).

Almost surely, 2^28371580 is an apocalyptic number.

28371580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28371580 is an abundant number, since it is smaller than the sum of its proper divisors (31208780).

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

28371580 is a wasteful number, since it uses less digits than its factorization.

28371580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418588 (or 1418586 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28371580 is about 5326.4979113861. The cubic root of 28371580 is about 304.9962554409.

The spelling of 28371580 in words is "twenty-eight million, three hundred seventy-one thousand, five hundred eighty".