78671934 has 48 divisors (see below), whose sum is σ = 186810624. Its totient is φ = 23730000.

The previous prime is 78671933. The next prime is 78671939. The reversal of 78671934 is 43917687.

It is a self number, because there is not a number n which added to its sum of digits gives 78671934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78671933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48907 + ... + 50489.

It is an arithmetic number, because the mean of its divisors is an integer number (3891888).

Almost surely, 2^78671934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78671934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93405312).

78671934 is an abundant number, since it is smaller than the sum of its proper divisors (108138690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78671934 is a wasteful number, since it uses less digits than its factorization.

78671934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1850 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 78671934 is about 8869.7200632263. The cubic root of 78671934 is about 428.4892612952.

It can be divided in two parts, 7867 and 1934, that added together give a square (9801 = 99²).

The spelling of 78671934 in words is "seventy-eight million, six hundred seventy-one thousand, nine hundred thirty-four".