28423625 has 16 divisors (see below), whose sum is σ = 36700560. Its totient is φ = 21952000.

The previous prime is 28423613. The next prime is 28423627. The reversal of 28423625 is 52632482.

It can be written as a sum of positive squares in 8 ways, for example, as 10942864 + 17480761 = 3308^2 + 4181^2 .

It is not a de Polignac number, because 28423625 - 2¹⁸ = 28161481 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28423591 and 28423600.

It is not an unprimeable number, because it can be changed into a prime (28423627) 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, 296 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (2293785).

Almost surely, 2^28423625 is an apocalyptic number.

28423625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28423625 is a deficient number, since it is larger than the sum of its proper divisors (8276935).

28423625 is an equidigital number, since it uses as much as digits as its factorization.

28423625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885 (or 7875 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 28423625 is about 5331.3811531347. The cubic root of 28423625 is about 305.1826371866.

The spelling of 28423625 in words is "twenty-eight million, four hundred twenty-three thousand, six hundred twenty-five".