71823864 has 32 divisors (see below), whose sum is σ = 205211520. Its totient is φ = 20521056.

The previous prime is 71823859. The next prime is 71823883. The reversal of 71823864 is 46832817.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213594 + ... + 213929.

It is an arithmetic number, because the mean of its divisors is an integer number (6412860).

Almost surely, 2^71823864 is an apocalyptic number.

It is an amenable number.

71823864 is an abundant number, since it is smaller than the sum of its proper divisors (133387656).

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

71823864 is a wasteful number, since it uses less digits than its factorization.

71823864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427539 (or 427535 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 71823864 is about 8474.8961055579. The cubic root of 71823864 is about 415.6772490441.

The spelling of 71823864 in words is "seventy-one million, eight hundred twenty-three thousand, eight hundred sixty-four".