78320934 has 48 divisors (see below), whose sum is σ = 181894752. Its totient is φ = 24292224.

The previous prime is 78320927. The next prime is 78320939. The reversal of 78320934 is 43902387.

It is a super-2 number, since 2×78320934² = 12268337405264712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78320939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12762 + ... + 17874.

It is an arithmetic number, because the mean of its divisors is an integer number (3789474).

Almost surely, 2^78320934 is an apocalyptic number.

78320934 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78320934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90947376).

78320934 is an abundant number, since it is smaller than the sum of its proper divisors (103573818).

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

78320934 is a wasteful number, since it uses less digits than its factorization.

78320934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181 (or 5178 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 78320934 is about 8849.9115249815. The cubic root of 78320934 is about 427.8510669105.

The spelling of 78320934 in words is "seventy-eight million, three hundred twenty thousand, nine hundred thirty-four".