28361725 has 24 divisors (see below), whose sum is σ = 41138240. Its totient is φ = 18990720.

The previous prime is 28361717. The next prime is 28361819. The reversal of 28361725 is 52716382.

It is a happy number.

It is not a de Polignac number, because 28361725 - 2³ = 28361717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5641 + ... + 9409.

Almost surely, 2^28361725 is an apocalyptic number.

28361725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28361725 is a deficient number, since it is larger than the sum of its proper divisors (12776515).

28361725 is a wasteful number, since it uses less digits than its factorization.

28361725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829 (or 3824 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 28361725 is about 5325.5727391521. The cubic root of 28361725 is about 304.9609373963.

The spelling of 28361725 in words is "twenty-eight million, three hundred sixty-one thousand, seven hundred twenty-five".