28613425 has 6 divisors (see below), whose sum is σ = 35480678. Its totient is φ = 22890720.

The previous prime is 28613419. The next prime is 28613437. The reversal of 28613425 is 52431682.

It can be written as a sum of positive squares in 3 ways, for example, as 12321 + 28601104 = 111^2 + 5348^2 .

It is not a de Polignac number, because 28613425 - 2¹¹ = 28611377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 572244 + ... + 572293.

Almost surely, 2^28613425 is an apocalyptic number.

28613425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28613425 is a deficient number, since it is larger than the sum of its proper divisors (6867253).

28613425 is a wasteful number, since it uses less digits than its factorization.

28613425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144547 (or 1144542 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 28613425 is about 5349.1518019215. The cubic root of 28613425 is about 305.8604209134.

The spelling of 28613425 in words is "twenty-eight million, six hundred thirteen thousand, four hundred twenty-five".