28816725 has 48 divisors (see below), whose sum is σ = 54996480. Its totient is φ = 13041600.

The previous prime is 28816703. The next prime is 28816759. The reversal of 28816725 is 52761882.

It is not a de Polignac number, because 28816725 - 2⁵ = 28816693 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68566 + ... + 68984.

It is an arithmetic number, because the mean of its divisors is an integer number (1145760).

Almost surely, 2^28816725 is an apocalyptic number.

28816725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28816725 is a deficient number, since it is larger than the sum of its proper divisors (26179755).

28816725 is a wasteful number, since it uses less digits than its factorization.

28816725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 565 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28816725 is about 5368.1211797052. The cubic root of 28816725 is about 306.5830972402.

The spelling of 28816725 in words is "twenty-eight million, eight hundred sixteen thousand, seven hundred twenty-five".