28314925 has 6 divisors (see below), whose sum is σ = 35110538. Its totient is φ = 22651920.

The previous prime is 28314901. The next prime is 28314929. The reversal of 28314925 is 52941382.

It can be written as a sum of positive squares in 3 ways, for example, as 499849 + 27815076 = 707^2 + 5274^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28314925 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 (28314929) by changing a digit.

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, 566274 + ... + 566323.

Almost surely, 2^28314925 is an apocalyptic number.

28314925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28314925 is a deficient number, since it is larger than the sum of its proper divisors (6795613).

28314925 is a wasteful number, since it uses less digits than its factorization.

28314925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132607 (or 1132602 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 28314925 is about 5321.1770314471. The cubic root of 28314925 is about 304.7931052293.

It can be divided in two parts, 28 and 314925, that multiplied together give a triangular number (8817900 = T₄₁₉₉).

The spelling of 28314925 in words is "twenty-eight million, three hundred fourteen thousand, nine hundred twenty-five".