28493313 has 4 divisors (see below), whose sum is σ = 37991088. Its totient is φ = 18995540.

The previous prime is 28493303. The next prime is 28493321. The reversal of 28493313 is 31339482.

It is a happy number.

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 28493313 - 2⁵ = 28493281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28493303) 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, 4748883 + ... + 4748888.

It is an arithmetic number, because the mean of its divisors is an integer number (9497772).

Almost surely, 2^28493313 is an apocalyptic number.

It is an amenable number.

28493313 is a deficient number, since it is larger than the sum of its proper divisors (9497775).

28493313 is an equidigital number, since it uses as much as digits as its factorization.

28493313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497774.

The product of its digits is 15552, while the sum is 33.

The square root of 28493313 is about 5337.9127943420. The cubic root of 28493313 is about 305.4318454918.

The spelling of 28493313 in words is "twenty-eight million, four hundred ninety-three thousand, three hundred thirteen".