78682320 has 160 divisors (see below), whose sum is σ = 275280000. Its totient is φ = 20653056.

The previous prime is 78682297. The next prime is 78682361. The reversal of 78682320 is 2328687.

It is a happy number.

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

It is a congruent number.

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, 157431 + ... + 157929.

It is an arithmetic number, because the mean of its divisors is an integer number (1720500).

Almost surely, 2^78682320 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 78682320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137640000).

78682320 is an abundant number, since it is smaller than the sum of its proper divisors (196597680).

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

78682320 is a wasteful number, since it uses less digits than its factorization.

78682320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 78682320 is about 8870.3055189773. The cubic root of 78682320 is about 428.5081163617.

The spelling of 78682320 in words is "seventy-eight million, six hundred eighty-two thousand, three hundred twenty".