79381740 has 144 divisors (see below), whose sum is σ = 241922016. Its totient is φ = 19430400.

The previous prime is 79381739. The next prime is 79381747. The reversal of 79381740 is 4718397.

79381740 = T₁₁₁₇ + T₁₁₁₈ + ... + T₁₂₃₁.

It is not an unprimeable number, because it can be changed into a prime (79381747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1301310 + ... + 1301370.

It is an arithmetic number, because the mean of its divisors is an integer number (1680014).

Almost surely, 2^79381740 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 79381740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120961008).

79381740 is an abundant number, since it is smaller than the sum of its proper divisors (162540276).

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

79381740 is a wasteful number, since it uses less digits than its factorization.

79381740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 79381740 is about 8909.6430904947. The cubic root of 79381740 is about 429.7740655520.

The spelling of 79381740 in words is "seventy-nine million, three hundred eighty-one thousand, seven hundred forty".