28394224320 has 448 divisors, whose sum is σ = 116031946752. Its totient is φ = 5709312000.

The previous prime is 28394224297. The next prime is 28394224349. The reversal of 28394224320 is 2342249382.

It is a tau number, because it is divible by the number of its divisors (448).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2285325 + ... + 2297715.

Almost surely, 2^28394224320 is an apocalyptic number.

28394224320 is a gapful number since it is divisible by the number (20) 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 28394224320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58015973376).

28394224320 is an abundant number, since it is smaller than the sum of its proper divisors (87637722432).

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

28394224320 is a wasteful number, since it uses less digits than its factorization.

28394224320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12460 (or 12450 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 28394224320 in words is "twenty-eight billion, three hundred ninety-four million, two hundred twenty-four thousand, three hundred twenty".