28013325 has 24 divisors (see below), whose sum is σ = 46502976. Its totient is φ = 14880000.

The previous prime is 28013317. The next prime is 28013347. The reversal of 28013325 is 52331082.

It is not a de Polignac number, because 28013325 - 2³ = 28013317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28013295 and 28013304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22725 + ... + 23925.

It is an arithmetic number, because the mean of its divisors is an integer number (1937624).

Almost surely, 2^28013325 is an apocalyptic number.

28013325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28013325 is a deficient number, since it is larger than the sum of its proper divisors (18489651).

28013325 is a wasteful number, since it uses less digits than its factorization.

28013325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28013325 is about 5292.7615665170. The cubic root of 28013325 is about 303.7070592484.

The spelling of 28013325 in words is "twenty-eight million, thirteen thousand, three hundred twenty-five".