78786416 has 20 divisors (see below), whose sum is σ = 152838432. Its totient is φ = 39344256.

The previous prime is 78786397. The next prime is 78786419. The reversal of 78786416 is 61468787.

It is a super-2 number, since 2×78786416² = 12414598692250112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78786419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12665 + ... + 17831.

Almost surely, 2^78786416 is an apocalyptic number.

It is an amenable number.

78786416 is a deficient number, since it is larger than the sum of its proper divisors (74052016).

78786416 is a wasteful number, since it uses less digits than its factorization.

78786416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6128 (or 6122 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 78786416 is about 8876.1712466581. The cubic root of 78786416 is about 428.6970038790.

The spelling of 78786416 in words is "seventy-eight million, seven hundred eighty-six thousand, four hundred sixteen".