28757295 has 32 divisors (see below), whose sum is σ = 58429440. Its totient is φ = 13145760.

The previous prime is 28757269. The next prime is 28757297. The reversal of 28757295 is 59275782.

It is a happy number.

It is not a de Polignac number, because 28757295 - 2⁶ = 28757231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28757295.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28757297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14271 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (1825920).

Almost surely, 2^28757295 is an apocalyptic number.

28757295 is an abundant number, since it is smaller than the sum of its proper divisors (29672145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28757295 is a wasteful number, since it uses less digits than its factorization.

28757295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30452 (or 30446 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 28757295 is about 5362.5828664926. The cubic root of 28757295 is about 306.3721922501.

The spelling of 28757295 in words is "twenty-eight million, seven hundred fifty-seven thousand, two hundred ninety-five".