78334406 has 4 divisors (see below), whose sum is σ = 117501612. Its totient is φ = 39167202.

The previous prime is 78334393. The next prime is 78334441. The reversal of 78334406 is 60443387.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78334406² = 12272558326745672, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 19583600 + ... + 19583603.

It is an arithmetic number, because the mean of its divisors is an integer number (29375403).

Almost surely, 2^78334406 is an apocalyptic number.

78334406 is a deficient number, since it is larger than the sum of its proper divisors (39167206).

78334406 is a wasteful number, since it uses less digits than its factorization.

78334406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39167205.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 78334406 is about 8850.6726298062. The cubic root of 78334406 is about 427.8755970875.

The spelling of 78334406 in words is "seventy-eight million, three hundred thirty-four thousand, four hundred six".