28984923 has 12 divisors (see below), whose sum is σ = 45673368. Its totient is φ = 17566560.

The previous prime is 28984913. The next prime is 28984927. The reversal of 28984923 is 32948982.

It is not a de Polignac number, because 28984923 - 2²⁰ = 27936347 is a prime.

It is a super-2 number, since 2×28984923² = 1680251522631858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984927) 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, 146290 + ... + 146487.

It is an arithmetic number, because the mean of its divisors is an integer number (3806114).

Almost surely, 2^28984923 is an apocalyptic number.

28984923 is a deficient number, since it is larger than the sum of its proper divisors (16688445).

28984923 is a wasteful number, since it uses less digits than its factorization.

28984923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292794 (or 292791 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28984923 is about 5383.7647608342. The cubic root of 28984923 is about 307.1784304415.

The spelling of 28984923 in words is "twenty-eight million, nine hundred eighty-four thousand, nine hundred twenty-three".