28167425 has 24 divisors (see below), whose sum is σ = 41039040. Its totient is φ = 18907200.

The previous prime is 28167383. The next prime is 28167427. The reversal of 28167425 is 52476182.

It is not a de Polignac number, because 28167425 - 2⁶ = 28167361 is a prime.

It is a super-2 number, since 2×28167425² = 1586807662261250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28167427) 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, 365 + ... + 7514.

It is an arithmetic number, because the mean of its divisors is an integer number (1709960).

Almost surely, 2^28167425 is an apocalyptic number.

28167425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28167425 is a deficient number, since it is larger than the sum of its proper divisors (12871615).

28167425 is a wasteful number, since it uses less digits than its factorization.

28167425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7913 (or 7908 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 28167425 is about 5307.2992190002. The cubic root of 28167425 is about 304.2629340206.

The spelling of 28167425 in words is "twenty-eight million, one hundred sixty-seven thousand, four hundred twenty-five".