78343834 has 8 divisors (see below), whose sum is σ = 117615060. Its totient is φ = 39138816.

The previous prime is 78343823. The next prime is 78343841. The reversal of 78343834 is 43834387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75637809 + 2706025 = 8697^2 + 1645^2 .

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

It is a super-2 number, since 2×78343834² = 12275512651639112, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 13479 + ... + 18394.

Almost surely, 2^78343834 is an apocalyptic number.

78343834 is a deficient number, since it is larger than the sum of its proper divisors (39271226).

78343834 is a wasteful number, since it uses less digits than its factorization.

78343834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33104.

The product of its digits is 193536, while the sum is 40.

The square root of 78343834 is about 8851.2052286680. The cubic root of 78343834 is about 427.8927621686.

It can be divided in two parts, 7834383 and 4, that added together give a palindrome (7834387).

The spelling of 78343834 in words is "seventy-eight million, three hundred forty-three thousand, eight hundred thirty-four".