28179797940 has 480 divisors, whose sum is σ = 109803724800. Its totient is φ = 5903850240.

The previous prime is 28179797911. The next prime is 28179797951. The reversal of 28179797940 is 4979797182.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6677151 + ... + 6681369.

It is an arithmetic number, because the mean of its divisors is an integer number (228757760).

Almost surely, 2^28179797940 is an apocalyptic number.

28179797940 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 28179797940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54901862400).

28179797940 is an abundant number, since it is smaller than the sum of its proper divisors (81623926860).

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

28179797940 is a wasteful number, since it uses less digits than its factorization.

28179797940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 63.

The spelling of 28179797940 in words is "twenty-eight billion, one hundred seventy-nine million, seven hundred ninety-seven thousand, nine hundred forty".