28671875 has 16 divisors (see below), whose sum is σ = 35937408. Its totient is φ = 22875000.

The previous prime is 28671871. The next prime is 28671899. The reversal of 28671875 is 57817682.

It is not a de Polignac number, because 28671875 - 2² = 28671871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28671871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77942 + ... + 78308.

It is an arithmetic number, because the mean of its divisors is an integer number (2246088).

Almost surely, 2^28671875 is an apocalyptic number.

28671875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28671875 is a deficient number, since it is larger than the sum of its proper divisors (7265533).

28671875 is an frugal number, since it uses more digits than its factorization.

28671875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 372 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 28671875 is about 5354.6124976510. The cubic root of 28671875 is about 306.0685444580.

The spelling of 28671875 in words is "twenty-eight million, six hundred seventy-one thousand, eight hundred seventy-five".