28753965 has 12 divisors (see below), whose sum is σ = 49840284. Its totient is φ = 15335424.

The previous prime is 28753961. The next prime is 28753981. The reversal of 28753965 is 56935782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22297284 + 6456681 = 4722^2 + 2541^2 .

It is not a de Polignac number, because 28753965 - 2² = 28753961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 638977 = 28753965 / (2 + 8 + 7 + 5 + 3 + 9 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28753965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28753961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319444 + ... + 319533.

It is an arithmetic number, because the mean of its divisors is an integer number (4153357).

Almost surely, 2^28753965 is an apocalyptic number.

It is an amenable number.

28753965 is a deficient number, since it is larger than the sum of its proper divisors (21086319).

28753965 is a wasteful number, since it uses less digits than its factorization.

28753965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638988 (or 638985 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28753965 is about 5362.2723727912. The cubic root of 28753965 is about 306.3603661635.

The spelling of 28753965 in words is "twenty-eight million, seven hundred fifty-three thousand, nine hundred sixty-five".