28497925 has 6 divisors (see below), whose sum is σ = 35337458. Its totient is φ = 22798320.

The previous prime is 28497901. The next prime is 28497947. The reversal of 28497925 is 52979482.

It can be written as a sum of positive squares in 3 ways, for example, as 1520289 + 26977636 = 1233^2 + 5194^2 .

It is not a de Polignac number, because 28497925 - 2¹³ = 28489733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 569934 + ... + 569983.

Almost surely, 2^28497925 is an apocalyptic number.

28497925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28497925 is a deficient number, since it is larger than the sum of its proper divisors (6839533).

28497925 is a wasteful number, since it uses less digits than its factorization.

28497925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139927 (or 1139922 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 28497925 is about 5338.3447809223. The cubic root of 28497925 is about 305.4483239275.

The spelling of 28497925 in words is "twenty-eight million, four hundred ninety-seven thousand, nine hundred twenty-five".