28831025 has 6 divisors (see below), whose sum is σ = 35750502. Its totient is φ = 23064800.

The previous prime is 28831007. The next prime is 28831073. The reversal of 28831025 is 52013882.

It can be written as a sum of positive squares in 3 ways, for example, as 1874161 + 26956864 = 1369^2 + 5192^2 .

It is not a de Polignac number, because 28831025 - 2¹² = 28826929 is a prime.

It is a Duffinian 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, 576596 + ... + 576645.

It is an arithmetic number, because the mean of its divisors is an integer number (5958417).

Almost surely, 2^28831025 is an apocalyptic number.

28831025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28831025 is a deficient number, since it is larger than the sum of its proper divisors (6919477).

28831025 is a wasteful number, since it uses less digits than its factorization.

28831025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153251 (or 1153246 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28831025 is about 5369.4529516516. The cubic root of 28831025 is about 306.6338017448.

It can be divided in two parts, 288 and 31025, that added together give a palindrome (31313).

The spelling of 28831025 in words is "twenty-eight million, eight hundred thirty-one thousand, twenty-five".