78870370 has 8 divisors (see below), whose sum is σ = 141966684. Its totient is φ = 31548144.

The previous prime is 78870359. The next prime is 78870373. The reversal of 78870370 is 7307887.

It can be written as a sum of positive squares in 2 ways, for example, as 71520849 + 7349521 = 8457^2 + 2711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78870373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3943509 + ... + 3943528.

Almost surely, 2^78870370 is an apocalyptic number.

78870370 is a deficient number, since it is larger than the sum of its proper divisors (63096314).

78870370 is a wasteful number, since it uses less digits than its factorization.

78870370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887044.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 78870370 is about 8880.8991661881. The cubic root of 78870370 is about 428.8492215405.

The spelling of 78870370 in words is "seventy-eight million, eight hundred seventy thousand, three hundred seventy".