79839744 has 80 divisors (see below), whose sum is σ = 216548640. Its totient is φ = 26132480.

The previous prime is 79839743. The next prime is 79839763. The reversal of 79839744 is 44793897.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79839743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90184 + ... + 91064.

It is an arithmetic number, because the mean of its divisors is an integer number (2706858).

Almost surely, 2^79839744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79839744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108274320).

79839744 is an abundant number, since it is smaller than the sum of its proper divisors (136708896).

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

79839744 is an equidigital number, since it uses as much as digits as its factorization.

79839744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 945 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 79839744 is about 8935.3088362966. The cubic root of 79839744 is about 430.5990281023.

The spelling of 79839744 in words is "seventy-nine million, eight hundred thirty-nine thousand, seven hundred forty-four".