28023925 has 6 divisors (see below), whose sum is σ = 34749698. Its totient is φ = 22419120.

The previous prime is 28023923. The next prime is 28023943. The reversal of 28023925 is 52932082.

It can be written as a sum of positive squares in 3 ways, for example, as 208849 + 27815076 = 457^2 + 5274^2 .

It is not a de Polignac number, because 28023925 - 2¹ = 28023923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28023923) 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, 560454 + ... + 560503.

Almost surely, 2^28023925 is an apocalyptic number.

28023925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28023925 is a deficient number, since it is larger than the sum of its proper divisors (6725773).

28023925 is a wasteful number, since it uses less digits than its factorization.

28023925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120967 (or 1120962 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28023925 is about 5293.7628394177. The cubic root of 28023925 is about 303.7453611264.

The spelling of 28023925 in words is "twenty-eight million, twenty-three thousand, nine hundred twenty-five".