28475023 has 4 divisors (see below), whose sum is σ = 28491688. Its totient is φ = 28458360.

The previous prime is 28475011. The next prime is 28475063. The reversal of 28475023 is 32057482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28475023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475063) 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, 5433 + ... + 9298.

It is an arithmetic number, because the mean of its divisors is an integer number (7122922).

Almost surely, 2^28475023 is an apocalyptic number.

28475023 is a deficient number, since it is larger than the sum of its proper divisors (16665).

28475023 is a wasteful number, since it uses less digits than its factorization.

28475023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16664.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28475023 is about 5336.1993028747. The cubic root of 28475023 is about 305.3664787608.

The spelling of 28475023 in words is "twenty-eight million, four hundred seventy-five thousand, twenty-three".