78722480 has 40 divisors (see below), whose sum is σ = 184183152. Its totient is φ = 31290624.

The previous prime is 78722471. The next prime is 78722507. The reversal of 78722480 is 8422787.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10022 + ... + 16058.

Almost surely, 2^78722480 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 78722480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92091576).

78722480 is an abundant number, since it is smaller than the sum of its proper divisors (105460672).

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

78722480 is a wasteful number, since it uses less digits than its factorization.

78722480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213 (or 6207 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 78722480 is about 8872.5689628202. The cubic root of 78722480 is about 428.5810084631.

The spelling of 78722480 in words is "seventy-eight million, seven hundred twenty-two thousand, four hundred eighty".