28422375 has 16 divisors (see below), whose sum is σ = 47295456. Its totient is φ = 15158400.

The previous prime is 28422371. The next prime is 28422391. The reversal of 28422375 is 57322482.

It is not a de Polignac number, because 28422375 - 2² = 28422371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28422371) 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, 37522 + ... + 38271.

It is an arithmetic number, because the mean of its divisors is an integer number (2955966).

Almost surely, 2^28422375 is an apocalyptic number.

28422375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28422375 is a deficient number, since it is larger than the sum of its proper divisors (18873081).

28422375 is an equidigital number, since it uses as much as digits as its factorization.

28422375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75811 (or 75801 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 28422375 is about 5331.2639214355. The cubic root of 28422375 is about 305.1781633978.

The spelling of 28422375 in words is "twenty-eight million, four hundred twenty-two thousand, three hundred seventy-five".