78164434 has 8 divisors (see below), whose sum is σ = 118385280. Its totient is φ = 38702676.

The previous prime is 78164413. The next prime is 78164447. The reversal of 78164434 is 43446187.

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

It is a super-2 number, since 2×78164434² = 12219357485080712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78164393 and 78164402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189514 + ... + 189925.

It is an arithmetic number, because the mean of its divisors is an integer number (14798160).

Almost surely, 2^78164434 is an apocalyptic number.

78164434 is a deficient number, since it is larger than the sum of its proper divisors (40220846).

78164434 is a wasteful number, since it uses less digits than its factorization.

78164434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379544.

The product of its digits is 64512, while the sum is 37.

The square root of 78164434 is about 8841.0652073152. The cubic root of 78164434 is about 427.5659011750.

The spelling of 78164434 in words is "seventy-eight million, one hundred sixty-four thousand, four hundred thirty-four".