28192225 has 12 divisors (see below), whose sum is σ = 35037936. Its totient is φ = 22502480.

The previous prime is 28192217. The next prime is 28192249. The reversal of 28192225 is 52229182.

It is not a de Polignac number, because 28192225 - 2³ = 28192217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13074 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (2919828).

Almost surely, 2^28192225 is an apocalyptic number.

28192225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28192225 is a deficient number, since it is larger than the sum of its proper divisors (6845711).

28192225 is a wasteful number, since it uses less digits than its factorization.

28192225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2571 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 28192225 is about 5309.6351098734. The cubic root of 28192225 is about 304.3522038930.

The spelling of 28192225 in words is "twenty-eight million, one hundred ninety-two thousand, two hundred twenty-five".