79223447940 has 288 divisors, whose sum is σ = 294240449664. Its totient is φ = 15731896320.

The previous prime is 79223447929. The next prime is 79223447977. The reversal of 79223447940 is 4974432297.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 588775 + ... + 710705.

It is an arithmetic number, because the mean of its divisors is an integer number (1021668228).

Almost surely, 2^79223447940 is an apocalyptic number.

79223447940 is a gapful number since it is divisible by the number (70) 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 79223447940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147120224832).

79223447940 is an abundant number, since it is smaller than the sum of its proper divisors (215017001724).

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

79223447940 is a wasteful number, since it uses less digits than its factorization.

79223447940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121987 (or 121978 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 79223447940 in words is "seventy-nine billion, two hundred twenty-three million, four hundred forty-seven thousand, nine hundred forty".