28722353 has 4 divisors (see below), whose sum is σ = 31333488. Its totient is φ = 26111220.

The previous prime is 28722349. The next prime is 28722359. The reversal of 28722353 is 35322782.

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 28722353 - 2² = 28722349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28722359) 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, 1305551 + ... + 1305572.

It is an arithmetic number, because the mean of its divisors is an integer number (7833372).

Almost surely, 2^28722353 is an apocalyptic number.

It is an amenable number.

28722353 is a deficient number, since it is larger than the sum of its proper divisors (2611135).

28722353 is a wasteful number, since it uses less digits than its factorization.

28722353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611134.

The product of its digits is 20160, while the sum is 32.

The square root of 28722353 is about 5359.3239312436. The cubic root of 28722353 is about 306.2480545205.

It can be divided in two parts, 2872 and 2353, that added together give a palindrome (5225).

The spelling of 28722353 in words is "twenty-eight million, seven hundred twenty-two thousand, three hundred fifty-three".