28997233344 has 336 divisors, whose sum is σ = 91158446080. Its totient is φ = 8778792960.

The previous prime is 28997233339. The next prime is 28997233393. The reversal of 28997233344 is 44333279982.

28997233344 is a `hidden beast` number, since 289 + 9 + 7 + 23 + 334 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43086192 + ... + 43086864.

Almost surely, 2^28997233344 is an apocalyptic number.

28997233344 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 28997233344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45579223040).

28997233344 is an abundant number, since it is smaller than the sum of its proper divisors (62161212736).

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

28997233344 is a wasteful number, since it uses less digits than its factorization.

28997233344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 855 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 28997233344 in words is "twenty-eight billion, nine hundred ninety-seven million, two hundred thirty-three thousand, three hundred forty-four".