78434618 has 16 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 37796976.

The previous prime is 78434563. The next prime is 78434663. The reversal of 78434618 is 81643487.

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 7 ways as a sum of consecutive naturals, for example, 49271 + ... + 50837.

It is an arithmetic number, because the mean of its divisors is an integer number (7620480).

Almost surely, 2^78434618 is an apocalyptic number.

78434618 is a deficient number, since it is larger than the sum of its proper divisors (43493062).

78434618 is a wasteful number, since it uses less digits than its factorization.

78434618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461.

The product of its digits is 129024, while the sum is 41.

The square root of 78434618 is about 8856.3320850113. The cubic root of 78434618 is about 428.0579775595.

The spelling of 78434618 in words is "seventy-eight million, four hundred thirty-four thousand, six hundred eighteen".