78368782 has 4 divisors (see below), whose sum is σ = 117553176. Its totient is φ = 39184390.

The previous prime is 78368737. The next prime is 78368789. The reversal of 78368782 is 28786387.

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

It is a super-2 number, since 2×78368782² = 12283331984327048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78368789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19592194 + ... + 19592197.

It is an arithmetic number, because the mean of its divisors is an integer number (29388294).

Almost surely, 2^78368782 is an apocalyptic number.

78368782 is a deficient number, since it is larger than the sum of its proper divisors (39184394).

78368782 is a wasteful number, since it uses less digits than its factorization.

78368782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39184393.

The product of its digits is 903168, while the sum is 49.

The square root of 78368782 is about 8852.6144160920. The cubic root of 78368782 is about 427.9381770837.

The spelling of 78368782 in words is "seventy-eight million, three hundred sixty-eight thousand, seven hundred eighty-two".