78801740 has 48 divisors (see below), whose sum is σ = 175633920. Its totient is φ = 29615040.

The previous prime is 78801739. The next prime is 78801761. The reversal of 78801740 is 4710887.

It is a self number, because there is not a number n which added to its sum of digits gives 78801740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48989 + ... + 50571.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

Almost surely, 2^78801740 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 78801740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87816960).

78801740 is an abundant number, since it is smaller than the sum of its proper divisors (96832180).

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

78801740 is a wasteful number, since it uses less digits than its factorization.

78801740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 78801740 is about 8877.0344147131. The cubic root of 78801740 is about 428.7247960093.

The spelling of 78801740 in words is "seventy-eight million, eight hundred one thousand, seven hundred forty".