28390753 has 4 divisors (see below), whose sum is σ = 28468480. Its totient is φ = 28313028.

The previous prime is 28390727. The next prime is 28390759. The reversal of 28390753 is 35709382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28390753 - 2⁵ = 28390721 is a prime.

It is a super-3 number, since 3×28390753³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28390759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38313 + ... + 39046.

It is an arithmetic number, because the mean of its divisors is an integer number (7117120).

Almost surely, 2^28390753 is an apocalyptic number.

It is an amenable number.

28390753 is a deficient number, since it is larger than the sum of its proper divisors (77727).

28390753 is an equidigital number, since it uses as much as digits as its factorization.

28390753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77726.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28390753 is about 5328.2973828419. The cubic root of 28390753 is about 305.0649436193.

The spelling of 28390753 in words is "twenty-eight million, three hundred ninety thousand, seven hundred fifty-three".