28023929 has 4 divisors (see below), whose sum is σ = 28225680. Its totient is φ = 27822180.

The previous prime is 28023923. The next prime is 28023943. The reversal of 28023929 is 92932082.

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 28023929 - 2⁸ = 28023673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28023923) 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, 100667 + ... + 100944.

It is an arithmetic number, because the mean of its divisors is an integer number (7056420).

Almost surely, 2^28023929 is an apocalyptic number.

It is an amenable number.

28023929 is a deficient number, since it is larger than the sum of its proper divisors (201751).

28023929 is a wasteful number, since it uses less digits than its factorization.

28023929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201750.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 28023929 is about 5293.7632172208. The cubic root of 28023929 is about 303.7453755781.

The spelling of 28023929 in words is "twenty-eight million, twenty-three thousand, nine hundred twenty-nine".