78811834 has 8 divisors (see below), whose sum is σ = 118284768. Its totient is φ = 39383580.

The previous prime is 78811807. The next prime is 78811841. The reversal of 78811834 is 43811887.

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

It is a super-2 number, since 2×78811834² = 12422610356887112, which contains 22 as substring.

It is an unprimeable number.

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, 6342 + ... + 14065.

It is an arithmetic number, because the mean of its divisors is an integer number (14785596).

Almost surely, 2^78811834 is an apocalyptic number.

78811834 is a deficient number, since it is larger than the sum of its proper divisors (39472934).

78811834 is a wasteful number, since it uses less digits than its factorization.

78811834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22340.

The product of its digits is 43008, while the sum is 40.

The square root of 78811834 is about 8877.6029422362. The cubic root of 78811834 is about 428.7431008645.

The spelling of 78811834 in words is "seventy-eight million, eight hundred eleven thousand, eight hundred thirty-four".