28471875 has 24 divisors (see below), whose sum is σ = 47465712. Its totient is φ = 15180000.

The previous prime is 28471871. The next prime is 28471903. The reversal of 28471875 is 57817482.

It is not a de Polignac number, because 28471875 - 2² = 28471871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28471871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7857 + ... + 10893.

It is an arithmetic number, because the mean of its divisors is an integer number (1977738).

Almost surely, 2^28471875 is an apocalyptic number.

28471875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28471875 is a deficient number, since it is larger than the sum of its proper divisors (18993837).

28471875 is an frugal number, since it uses more digits than its factorization.

28471875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065 (or 3045 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 28471875 is about 5335.9043282278. The cubic root of 28471875 is about 305.3552252832.

The spelling of 28471875 in words is "twenty-eight million, four hundred seventy-one thousand, eight hundred seventy-five".