28910793 has 8 divisors (see below), whose sum is σ = 40223808. Its totient is φ = 18435824.

The previous prime is 28910779. The next prime is 28910797. The reversal of 28910793 is 39701982.

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 28910793 - 2²⁰ = 27862217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28910797) 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, 209430 + ... + 209567.

It is an arithmetic number, because the mean of its divisors is an integer number (5027976).

Almost surely, 2^28910793 is an apocalyptic number.

28910793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28910793 is a deficient number, since it is larger than the sum of its proper divisors (11313015).

28910793 is a wasteful number, since it uses less digits than its factorization.

28910793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419023.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 28910793 is about 5376.8757657212. The cubic root of 28910793 is about 306.9163335191.

The spelling of 28910793 in words is "twenty-eight million, nine hundred ten thousand, seven hundred ninety-three".