78343836 has 12 divisors (see below), whose sum is σ = 182802312. Its totient is φ = 26114608.

The previous prime is 78343823. The next prime is 78343841. The reversal of 78343836 is 63834387.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×78343836² = 12275513278389792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

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, 3264315 + ... + 3264338.

It is an arithmetic number, because the mean of its divisors is an integer number (15233526).

Almost surely, 2^78343836 is an apocalyptic number.

It is an amenable number.

78343836 is an abundant number, since it is smaller than the sum of its proper divisors (104458476).

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

78343836 is a wasteful number, since it uses less digits than its factorization.

78343836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528660 (or 6528658 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 78343836 is about 8851.2053416470. The cubic root of 78343836 is about 427.8927658098.

The spelling of 78343836 in words is "seventy-eight million, three hundred forty-three thousand, eight hundred thirty-six".