78982311 has 4 divisors (see below), whose sum is σ = 105309752. Its totient is φ = 52654872.

The previous prime is 78982307. The next prime is 78982313. The reversal of 78982311 is 11328987.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78982311 - 2² = 78982307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78982311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78982313) 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, 13163716 + ... + 13163721.

It is an arithmetic number, because the mean of its divisors is an integer number (26327438).

Almost surely, 2^78982311 is an apocalyptic number.

78982311 is a deficient number, since it is larger than the sum of its proper divisors (26327441).

78982311 is a wasteful number, since it uses less digits than its factorization.

78982311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26327440.

The product of its digits is 24192, while the sum is 39.

The square root of 78982311 is about 8887.1992776127. The cubic root of 78982311 is about 429.0520147102.

The spelling of 78982311 in words is "seventy-eight million, nine hundred eighty-two thousand, three hundred eleven".