28713375 has 24 divisors (see below), whose sum is σ = 51762672. Its totient is φ = 15313200.

The previous prime is 28713367. The next prime is 28713383. The reversal of 28713375 is 57331782.

28713375 is a `hidden beast` number, since 287 + 1 + 3 + 375 = 666.

It is an interprime number because it is at equal distance from previous prime (28713367) and next prime (28713383).

It is not a de Polignac number, because 28713375 - 2³ = 28713367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11637 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (2156778).

Almost surely, 2^28713375 is an apocalyptic number.

28713375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28713375 is a deficient number, since it is larger than the sum of its proper divisors (23049297).

28713375 is a wasteful number, since it uses less digits than its factorization.

28713375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25544 (or 25531 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 28713375 is about 5358.4862601298. The cubic root of 28713375 is about 306.2161423072.

The spelling of 28713375 in words is "twenty-eight million, seven hundred thirteen thousand, three hundred seventy-five".