79134840 has 128 divisors (see below), whose sum is σ = 269568000. Its totient is φ = 20640384.

The previous prime is 79134833. The next prime is 79134841. The reversal of 79134840 is 4843197.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 79134795 and 79134804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79134841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49981 + ... + 51539.

It is an arithmetic number, because the mean of its divisors is an integer number (2106000).

Almost surely, 2^79134840 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 79134840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134784000).

79134840 is an abundant number, since it is smaller than the sum of its proper divisors (190433160).

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

79134840 is a wasteful number, since it uses less digits than its factorization.

79134840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 79134840 is about 8895.7765259701. The cubic root of 79134840 is about 429.3280292243.

The spelling of 79134840 in words is "seventy-nine million, one hundred thirty-four thousand, eight hundred forty".