78513740 has 24 divisors (see below), whose sum is σ = 166582752. Its totient is φ = 31080960.

The previous prime is 78513739. The next prime is 78513779. The reversal of 78513740 is 4731587.

It is a self number, because there is not a number n which added to its sum of digits gives 78513740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18296 + ... + 22175.

It is an arithmetic number, because the mean of its divisors is an integer number (6940948).

Almost surely, 2^78513740 is an apocalyptic number.

It is an amenable number.

78513740 is an abundant number, since it is smaller than the sum of its proper divisors (88069012).

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

78513740 is a wasteful number, since it uses less digits than its factorization.

78513740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40577 (or 40575 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 78513740 is about 8860.7979324664. The cubic root of 78513740 is about 428.2018656453.

The spelling of 78513740 in words is "seventy-eight million, five hundred thirteen thousand, seven hundred forty".