78885813 has 8 divisors (see below), whose sum is σ = 108023968. Its totient is φ = 51169104.

The previous prime is 78885811. The next prime is 78885827. The reversal of 78885813 is 31858887.

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

It is not a de Polignac number, because 78885813 - 2¹ = 78885811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78885811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355231 + ... + 355452.

It is an arithmetic number, because the mean of its divisors is an integer number (13502996).

Almost surely, 2^78885813 is an apocalyptic number.

It is an amenable number.

78885813 is a deficient number, since it is larger than the sum of its proper divisors (29138155).

78885813 is a wasteful number, since it uses less digits than its factorization.

78885813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710723.

The product of its digits is 430080, while the sum is 48.

The square root of 78885813 is about 8881.7685738821. The cubic root of 78885813 is about 428.8772096021.

The spelling of 78885813 in words is "seventy-eight million, eight hundred eighty-five thousand, eight hundred thirteen".