28037225 has 12 divisors (see below), whose sum is σ = 35159580. Its totient is φ = 22176000.

The previous prime is 28037201. The next prime is 28037263. The reversal of 28037225 is 52273082.

It can be written as a sum of positive squares in 6 ways, for example, as 3988009 + 24049216 = 1997^2 + 4904^2 .

It is not a de Polignac number, because 28037225 - 2¹² = 28033129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4076 + ... + 8525.

It is an arithmetic number, because the mean of its divisors is an integer number (2929965).

Almost surely, 2^28037225 is an apocalyptic number.

28037225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28037225 is a deficient number, since it is larger than the sum of its proper divisors (7122355).

28037225 is a wasteful number, since it uses less digits than its factorization.

28037225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12700 (or 12695 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28037225 is about 5295.0188857076. The cubic root of 28037225 is about 303.7934054835.

The spelling of 28037225 in words is "twenty-eight million, thirty-seven thousand, two hundred twenty-five".