28130375 has 32 divisors (see below), whose sum is σ = 43225728. Its totient is φ = 17798400.

The previous prime is 28130363. The next prime is 28130381. The reversal of 28130375 is 57303182.

It is not a de Polignac number, because 28130375 - 2¹⁴ = 28113991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10139 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (1350804).

Almost surely, 2^28130375 is an apocalyptic number.

28130375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28130375 is a deficient number, since it is larger than the sum of its proper divisors (15095353).

28130375 is a wasteful number, since it uses less digits than its factorization.

28130375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28130375 is about 5303.8075945494. The cubic root of 28130375 is about 304.1294714844.

The spelling of 28130375 in words is "twenty-eight million, one hundred thirty thousand, three hundred seventy-five".