78118842 has 64 divisors (see below), whose sum is σ = 175893120. Its totient is φ = 22984704.

The previous prime is 78118819. The next prime is 78118867. The reversal of 78118842 is 24881187.

It is a happy number.

It is a super-2 number, since 2×78118842² = 12205106950841928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78118842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335158 + ... + 335390.

It is an arithmetic number, because the mean of its divisors is an integer number (2748330).

Almost surely, 2^78118842 is an apocalyptic number.

78118842 is an abundant number, since it is smaller than the sum of its proper divisors (97774278).

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

78118842 is a wasteful number, since it uses less digits than its factorization.

78118842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its digits is 28672, while the sum is 39.

The square root of 78118842 is about 8838.4864088825. The cubic root of 78118842 is about 427.4827543400.

It can be divided in two parts, 7811 and 8842, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 78118842 in words is "seventy-eight million, one hundred eighteen thousand, eight hundred forty-two".