28479297792 has 144 divisors (see below), whose sum is σ = 83421592128. Its totient is φ = 8553431040.

The previous prime is 28479297703. The next prime is 28479297799. The reversal of 28479297792 is 29779297482.

It is a super-2 number, since 2×28479297792² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (28479297799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939708 + ... + 969540.

It is an arithmetic number, because the mean of its divisors is an integer number (579316612).

Almost surely, 2^28479297792 is an apocalyptic number.

28479297792 is a gapful number since it is divisible by the number (22) 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 28479297792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41710796064).

28479297792 is an abundant number, since it is smaller than the sum of its proper divisors (54942294336).

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

28479297792 is a wasteful number, since it uses less digits than its factorization.

28479297792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29976 (or 29962 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 66.

The spelling of 28479297792 in words is "twenty-eight billion, four hundred seventy-nine million, two hundred ninety-seven thousand, seven hundred ninety-two".