79434138 has 64 divisors (see below), whose sum is σ = 187794432. Its totient is φ = 21928320.

The previous prime is 79434109. The next prime is 79434151. The reversal of 79434138 is 83143497.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 79434096 and 79434105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280545 + ... + 280827.

It is an arithmetic number, because the mean of its divisors is an integer number (2934288).

Almost surely, 2^79434138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79434138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93897216).

79434138 is an abundant number, since it is smaller than the sum of its proper divisors (108360294).

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

79434138 is a wasteful number, since it uses less digits than its factorization.

79434138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its digits is 72576, while the sum is 39.

The square root of 79434138 is about 8912.5831272421. The cubic root of 79434138 is about 429.8686059694.

The spelling of 79434138 in words is "seventy-nine million, four hundred thirty-four thousand, one hundred thirty-eight".