28097425 has 6 divisors (see below), whose sum is σ = 34840838. Its totient is φ = 22477920.

The previous prime is 28097417. The next prime is 28097429. The reversal of 28097425 is 52479082.

It can be written as a sum of positive squares in 3 ways, for example, as 123904 + 27973521 = 352^2 + 5289^2 .

It is not a de Polignac number, because 28097425 - 2³ = 28097417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28097429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561924 + ... + 561973.

Almost surely, 2^28097425 is an apocalyptic number.

28097425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28097425 is a deficient number, since it is larger than the sum of its proper divisors (6743413).

28097425 is a wasteful number, since it uses less digits than its factorization.

28097425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123907 (or 1123902 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28097425 is about 5300.7004254155. The cubic root of 28097425 is about 304.0106795937.

The spelling of 28097425 in words is "twenty-eight million, ninety-seven thousand, four hundred twenty-five".