28963225 has 6 divisors (see below), whose sum is σ = 35914430. Its totient is φ = 23170560.

The previous prime is 28963213. The next prime is 28963237. The reversal of 28963225 is 52236982.

It is an interprime number because it is at equal distance from previous prime (28963213) and next prime (28963237).

It can be written as a sum of positive squares in 3 ways, for example, as 29584 + 28933641 = 172^2 + 5379^2 .

It is not a de Polignac number, because 28963225 - 2¹⁵ = 28930457 is a prime.

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, 579240 + ... + 579289.

Almost surely, 2^28963225 is an apocalyptic number.

28963225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28963225 is a deficient number, since it is larger than the sum of its proper divisors (6951205).

28963225 is a wasteful number, since it uses less digits than its factorization.

28963225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158539 (or 1158534 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 28963225 is about 5381.7492509406. The cubic root of 28963225 is about 307.1017604495.

The spelling of 28963225 in words is "twenty-eight million, nine hundred sixty-three thousand, two hundred twenty-five".