28801313 has 8 divisors (see below), whose sum is σ = 30621888. Its totient is φ = 27028144.

The previous prime is 28801307. The next prime is 28801319. The reversal of 28801313 is 31310882.

It is an interprime number because it is at equal distance from previous prime (28801307) and next prime (28801319).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28801313 - 2⁸ = 28801057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28801319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10595 + ... + 13032.

It is an arithmetic number, because the mean of its divisors is an integer number (3827736).

Almost surely, 2^28801313 is an apocalyptic number.

28801313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28801313 is a deficient number, since it is larger than the sum of its proper divisors (1820575).

28801313 is a wasteful number, since it uses less digits than its factorization.

28801313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23703.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28801313 is about 5366.6854761575. The cubic root of 28801313 is about 306.5284310546.

The spelling of 28801313 in words is "twenty-eight million, eight hundred one thousand, three hundred thirteen".