28125424 has 20 divisors (see below), whose sum is σ = 55108080. Its totient is φ = 13904000.

The previous prime is 28125421. The next prime is 28125431. The reversal of 28125424 is 42452182.

It is a junction number, because it is equal to n+sod(n) for n = 28125392 and 28125401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8452 + ... + 11299.

It is an arithmetic number, because the mean of its divisors is an integer number (2755404).

Almost surely, 2^28125424 is an apocalyptic number.

It is an amenable number.

28125424 is a deficient number, since it is larger than the sum of its proper divisors (26982656).

28125424 is a wasteful number, since it uses less digits than its factorization.

28125424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848 (or 19842 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 28125424 is about 5303.3408338518. The cubic root of 28125424 is about 304.1116279806. Note that the first 3 decimals are identical.

The spelling of 28125424 in words is "twenty-eight million, one hundred twenty-five thousand, four hundred twenty-four".