78623980 has 48 divisors (see below), whose sum is σ = 177339456. Its totient is φ = 29173760.

The previous prime is 78623977. The next prime is 78623981. The reversal of 78623980 is 8932687.

It is not an unprimeable number, because it can be changed into a prime (78623981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22512 + ... + 25768.

It is an arithmetic number, because the mean of its divisors is an integer number (3694572).

Almost surely, 2^78623980 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 78623980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88669728).

78623980 is an abundant number, since it is smaller than the sum of its proper divisors (98715476).

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

78623980 is a wasteful number, since it uses less digits than its factorization.

78623980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354 (or 3352 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 78623980 is about 8867.0164091424. The cubic root of 78623980 is about 428.4021825903.

The spelling of 78623980 in words is "seventy-eight million, six hundred twenty-three thousand, nine hundred eighty".