28270140 has 48 divisors (see below), whose sum is σ = 81715200. Its totient is φ = 7295040.

The previous prime is 28270129. The next prime is 28270159. The reversal of 28270140 is 4107282.

It is a self number, because there is not a number n which added to its sum of digits gives 28270140.

It is a congruent number.

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, 5740 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (1702400).

Almost surely, 2^28270140 is an apocalyptic number.

28270140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28270140 is an abundant number, since it is smaller than the sum of its proper divisors (53445060).

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

28270140 is a wasteful number, since it uses less digits than its factorization.

28270140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15242 (or 15240 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28270140 is about 5316.9671806397. The cubic root of 28270140 is about 304.6323259200.

The spelling of 28270140 in words is "twenty-eight million, two hundred seventy thousand, one hundred forty".