78366834 has 48 divisors (see below), whose sum is σ = 208982592. Its totient is φ = 20667744.

The previous prime is 78366823. The next prime is 78366839. The reversal of 78366834 is 43866387.

It is a super-2 number, since 2×78366834² = 12282721342367112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78366834.

It is not an unprimeable number, because it can be changed into a prime (78366839) 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 23 ways as a sum of consecutive naturals, for example, 22284 + ... + 25559.

It is an arithmetic number, because the mean of its divisors is an integer number (4353804).

Almost surely, 2^78366834 is an apocalyptic number.

78366834 is an abundant number, since it is smaller than the sum of its proper divisors (130615758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78366834 is a wasteful number, since it uses less digits than its factorization.

78366834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47871 (or 47868 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 78366834 is about 8852.5043914138. The cubic root of 78366834 is about 427.9346313245.

The spelling of 78366834 in words is "seventy-eight million, three hundred sixty-six thousand, eight hundred thirty-four".