28979123712 has 960 divisors, whose sum is σ = 108822320640. Its totient is φ = 6743654400.

The previous prime is 28979123599. The next prime is 28979123713. The reversal of 28979123712 is 21732197982.

It is a super-2 number, since 2×28979123712² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979123713) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 408156637 + ... + 408156707.

It is an arithmetic number, because the mean of its divisors is an integer number (113356584).

Almost surely, 2^28979123712 is an apocalyptic number.

28979123712 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 28979123712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54411160320).

28979123712 is an abundant number, since it is smaller than the sum of its proper divisors (79843196928).

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

28979123712 is a wasteful number, since it uses less digits than its factorization.

28979123712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 140 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The spelling of 28979123712 in words is "twenty-eight billion, nine hundred seventy-nine million, one hundred twenty-three thousand, seven hundred twelve".