28928793 has 4 divisors (see below), whose sum is σ = 38571728. Its totient is φ = 19285860.

The previous prime is 28928789. The next prime is 28928803. The reversal of 28928793 is 39782982.

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 not a de Polignac number, because 28928793 - 2² = 28928789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28928743) 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, 4821463 + ... + 4821468.

It is an arithmetic number, because the mean of its divisors is an integer number (9642932).

Almost surely, 2^28928793 is an apocalyptic number.

It is an amenable number.

28928793 is a deficient number, since it is larger than the sum of its proper divisors (9642935).

28928793 is an equidigital number, since it uses as much as digits as its factorization.

28928793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642934.

The product of its digits is 435456, while the sum is 48.

The square root of 28928793 is about 5378.5493397384. The cubic root of 28928793 is about 306.9800161707.

The spelling of 28928793 in words is "twenty-eight million, nine hundred twenty-eight thousand, seven hundred ninety-three".