28453357 has 4 divisors (see below), whose sum is σ = 28490940. Its totient is φ = 28415776.

The previous prime is 28453343. The next prime is 28453361. The reversal of 28453357 is 75335482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 22982436 = 2339^2 + 4794^2 .

It is a cyclic number.

It is not a de Polignac number, because 28453357 - 2¹⁵ = 28420589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454357) 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, 17632 + ... + 19177.

It is an arithmetic number, because the mean of its divisors is an integer number (7122735).

Almost surely, 2^28453357 is an apocalyptic number.

It is an amenable number.

28453357 is a deficient number, since it is larger than the sum of its proper divisors (37583).

28453357 is an equidigital number, since it uses as much as digits as its factorization.

28453357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37582.

The product of its digits is 100800, while the sum is 37.

The square root of 28453357 is about 5334.1688199756. The cubic root of 28453357 is about 305.2890102972.

The spelling of 28453357 in words is "twenty-eight million, four hundred fifty-three thousand, three hundred fifty-seven".