28202923 has 12 divisors (see below), whose sum is σ = 32888272. Its totient is φ = 23685120.

The previous prime is 28202891. The next prime is 28202927. The reversal of 28202923 is 32920282.

It is not a de Polignac number, because 28202923 - 2⁵ = 28202891 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28202891 and 28202900.

It is not an unprimeable number, because it can be changed into a prime (28202927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109611 + ... + 109867.

Almost surely, 2^28202923 is an apocalyptic number.

28202923 is a deficient number, since it is larger than the sum of its proper divisors (4685349).

28202923 is an frugal number, since it uses more digits than its factorization.

28202923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28202923 is about 5310.6424281814. The cubic root of 28202923 is about 304.3906961619.

The spelling of 28202923 in words is "twenty-eight million, two hundred two thousand, nine hundred twenty-three".