28226925 has 18 divisors (see below), whose sum is σ = 50557962. Its totient is φ = 15054240.

The previous prime is 28226923. The next prime is 28226927. The reversal of 28226925 is 52962282.

It is an interprime number because it is at equal distance from previous prime (28226923) and next prime (28226927).

It can be written as a sum of positive squares in 3 ways, for example, as 915849 + 27311076 = 957^2 + 5226^2 .

It is not a de Polignac number, because 28226925 - 2¹ = 28226923 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28226925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28226923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62502 + ... + 62951.

Almost surely, 2^28226925 is an apocalyptic number.

28226925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28226925 is a deficient number, since it is larger than the sum of its proper divisors (22331037).

28226925 is a wasteful number, since it uses less digits than its factorization.

28226925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125469 (or 125461 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28226925 is about 5312.9017495150. The cubic root of 28226925 is about 304.4770218936.

The spelling of 28226925 in words is "twenty-eight million, two hundred twenty-six thousand, nine hundred twenty-five".