28140460 has 12 divisors (see below), whose sum is σ = 59095008. Its totient is φ = 11256176.

The previous prime is 28140443. The next prime is 28140479. The reversal of 28140460 is 6404182.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703492 + ... + 703531.

It is an arithmetic number, because the mean of its divisors is an integer number (4924584).

Almost surely, 2^28140460 is an apocalyptic number.

28140460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28140460 is an abundant number, since it is smaller than the sum of its proper divisors (30954548).

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

28140460 is a wasteful number, since it uses less digits than its factorization.

28140460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407032 (or 1407030 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28140460 is about 5304.7582414282. The cubic root of 28140460 is about 304.1658115528.

The spelling of 28140460 in words is "twenty-eight million, one hundred forty thousand, four hundred sixty".