28430123904 has 320 divisors, whose sum is σ = 104135871840. Its totient is φ = 7497805824.

The previous prime is 28430123857. The next prime is 28430123933. The reversal of 28430123904 is 40932103482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 928422 + ... + 958554.

Almost surely, 2^28430123904 is an apocalyptic number.

28430123904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28430123904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52067935920).

28430123904 is an abundant number, since it is smaller than the sum of its proper divisors (75705747936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28430123904 is a wasteful number, since it uses less digits than its factorization.

28430123904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30179 (or 30158 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 28430123904 in words is "twenty-eight billion, four hundred thirty million, one hundred twenty-three thousand, nine hundred four".