28456025 has 12 divisors (see below), whose sum is σ = 38000172. Its totient is φ = 21013440.

The previous prime is 28456007. The next prime is 28456063. The reversal of 28456025 is 52065482.

It can be written as a sum of positive squares in 6 ways, for example, as 10316944 + 18139081 = 3212^2 + 4259^2 .

It is not a de Polignac number, because 28456025 - 2⁶ = 28455961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28455982 and 28456000.

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, 43454 + ... + 44103.

It is an arithmetic number, because the mean of its divisors is an integer number (3166681).

Almost surely, 2^28456025 is an apocalyptic number.

28456025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28456025 is a deficient number, since it is larger than the sum of its proper divisors (9544147).

28456025 is a wasteful number, since it uses less digits than its factorization.

28456025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87580 (or 87575 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 28456025 is about 5334.4188999365. The cubic root of 28456025 is about 305.2985520609.

The spelling of 28456025 in words is "twenty-eight million, four hundred fifty-six thousand, twenty-five".