78710440 has 32 divisors (see below), whose sum is σ = 178174080. Its totient is φ = 31292992.

The previous prime is 78710431. The next prime is 78710453. The reversal of 78710440 is 4401787.

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, 789 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (5567940).

Almost surely, 2^78710440 is an apocalyptic number.

It is an amenable number.

78710440 is an abundant number, since it is smaller than the sum of its proper divisors (99463640).

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

78710440 is a wasteful number, since it uses less digits than its factorization.

78710440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961 (or 11957 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 78710440 is about 8871.8904411630. The cubic root of 78710440 is about 428.5591579556.

The spelling of 78710440 in words is "seventy-eight million, seven hundred ten thousand, four hundred forty".