28296725 has 6 divisors (see below), whose sum is σ = 35087970. Its totient is φ = 22637360.

The previous prime is 28296703. The next prime is 28296731. The reversal of 28296725 is 52769282.

It can be written as a sum of positive squares in 3 ways, for example, as 1350244 + 26946481 = 1162^2 + 5191^2 .

It is not a de Polignac number, because 28296725 - 2⁶ = 28296661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565910 + ... + 565959.

It is an arithmetic number, because the mean of its divisors is an integer number (5847995).

Almost surely, 2^28296725 is an apocalyptic number.

28296725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28296725 is a deficient number, since it is larger than the sum of its proper divisors (6791245).

28296725 is a wasteful number, since it uses less digits than its factorization.

28296725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131879 (or 1131874 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 28296725 is about 5319.4666085990. The cubic root of 28296725 is about 304.7277872216.

The spelling of 28296725 in words is "twenty-eight million, two hundred ninety-six thousand, seven hundred twenty-five".