28425025 has 6 divisors (see below), whose sum is σ = 35247062. Its totient is φ = 22740000.

The previous prime is 28424993. The next prime is 28425029. The reversal of 28425025 is 52052482.

It can be written as a sum of positive squares in 3 ways, for example, as 5919489 + 22505536 = 2433^2 + 4744^2 .

It is not a de Polignac number, because 28425025 - 2⁵ = 28424993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28424984 and 28425002.

It is not an unprimeable number, because it can be changed into a prime (28425029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568476 + ... + 568525.

Almost surely, 2^28425025 is an apocalyptic number.

28425025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28425025 is a deficient number, since it is larger than the sum of its proper divisors (6822037).

28425025 is a wasteful number, since it uses less digits than its factorization.

28425025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137011 (or 1137006 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28425025 is about 5331.5124495775. The cubic root of 28425025 is about 305.1876476744.

The spelling of 28425025 in words is "twenty-eight million, four hundred twenty-five thousand, twenty-five".