78334771 has 8 divisors (see below), whose sum is σ = 81406080. Its totient is φ = 75288192.

The previous prime is 78334747. The next prime is 78334783. The reversal of 78334771 is 17743387.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78334771 is a prime.

It is a super-2 number, since 2×78334771² = 12272672695244882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78334471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (10175760).

Almost surely, 2^78334771 is an apocalyptic number.

78334771 is a deficient number, since it is larger than the sum of its proper divisors (3071309).

78334771 is a wasteful number, since it uses less digits than its factorization.

78334771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365.

The product of its digits is 98784, while the sum is 40.

The square root of 78334771 is about 8850.6932496839. The cubic root of 78334771 is about 427.8762616501.

The spelling of 78334771 in words is "seventy-eight million, three hundred thirty-four thousand, seven hundred seventy-one".