28140160 has 32 divisors (see below), whose sum is σ = 67274100. Its totient is φ = 11255808.

The previous prime is 28140143. The next prime is 28140187. The reversal of 28140160 is 6104182.

It can be written as a sum of positive squares in 2 ways, for example, as 28132416 + 7744 = 5304^2 + 88^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 21345 + ... + 22624.

Almost surely, 2^28140160 is an apocalyptic number.

28140160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28140160 is an abundant number, since it is smaller than the sum of its proper divisors (39133940).

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

28140160 is an equidigital number, since it uses as much as digits as its factorization.

28140160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43988 (or 43976 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28140160 is about 5304.7299648521. The cubic root of 28140160 is about 304.1647306647.

The spelling of 28140160 in words is "twenty-eight million, one hundred forty thousand, one hundred sixty".