78494320 has 80 divisors (see below), whose sum is σ = 194228640. Its totient is φ = 29417472.

The previous prime is 78494309. The next prime is 78494341. The reversal of 78494320 is 2349487.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78494320² = 12322716544524800, which contains 22 as substring.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 78494320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171532 + ... + 171988.

It is an arithmetic number, because the mean of its divisors is an integer number (2427858).

Almost surely, 2^78494320 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 78494320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97114320).

78494320 is an abundant number, since it is smaller than the sum of its proper divisors (115734320).

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

78494320 is a wasteful number, since it uses less digits than its factorization.

78494320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 78494320 is about 8859.7020265921. The cubic root of 78494320 is about 428.1665581694.

The spelling of 78494320 in words is "seventy-eight million, four hundred ninety-four thousand, three hundred twenty".