78434057 has 8 divisors (see below), whose sum is σ = 85134336. Its totient is φ = 71829072.

The previous prime is 78434029. The next prime is 78434089. The reversal of 78434057 is 75043487.

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

It is a cyclic number.

It is not a de Polignac number, because 78434057 - 2¹² = 78429961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78434057.

It is not an unprimeable number, because it can be changed into a prime (78431057) by changing a digit.

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, 22103 + ... + 25404.

It is an arithmetic number, because the mean of its divisors is an integer number (10641792).

Almost surely, 2^78434057 is an apocalyptic number.

It is an amenable number.

78434057 is a deficient number, since it is larger than the sum of its proper divisors (6700279).

78434057 is a wasteful number, since it uses less digits than its factorization.

78434057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47647.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 78434057 is about 8856.3004127006. The cubic root of 78434057 is about 428.0569570021.

The spelling of 78434057 in words is "seventy-eight million, four hundred thirty-four thousand, fifty-seven".