28480225 has 12 divisors (see below), whose sum is σ = 35386624. Its totient is φ = 22738320.

The previous prime is 28480213. The next prime is 28480237. The reversal of 28480225 is 52208482.

It is an interprime number because it is at equal distance from previous prime (28480213) and next prime (28480237).

It is not a de Polignac number, because 28480225 - 2⁷ = 28480097 is a prime.

It is a super-2 number, since 2×28480225² = 1622246432101250, which contains 22 as substring.

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, 17392 + ... + 18958.

Almost surely, 2^28480225 is an apocalyptic number.

28480225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28480225 is a deficient number, since it is larger than the sum of its proper divisors (6906399).

28480225 is a wasteful number, since it uses less digits than its factorization.

28480225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 28480225 is about 5336.6867061877. The cubic root of 28480225 is about 305.3850730647.

The spelling of 28480225 in words is "twenty-eight million, four hundred eighty thousand, two hundred twenty-five".