28711325 has 6 divisors (see below), whose sum is σ = 35602074. Its totient is φ = 22969040.

The previous prime is 28711307. The next prime is 28711339. The reversal of 28711325 is 52311782.

It can be written as a sum of positive squares in 3 ways, for example, as 376996 + 28334329 = 614^2 + 5323^2 .

It is not a de Polignac number, because 28711325 - 2⁸ = 28711069 is a prime.

It is a Duffinian number.

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, 574202 + ... + 574251.

It is an arithmetic number, because the mean of its divisors is an integer number (5933679).

Almost surely, 2^28711325 is an apocalyptic number.

28711325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28711325 is a deficient number, since it is larger than the sum of its proper divisors (6890749).

28711325 is a wasteful number, since it uses less digits than its factorization.

28711325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148463 (or 1148458 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 28711325 is about 5358.2949713505. The cubic root of 28711325 is about 306.2088546694.

The spelling of 28711325 in words is "twenty-eight million, seven hundred eleven thousand, three hundred twenty-five".