71983836 has 48 divisors (see below), whose sum is σ = 194745600. Its totient is φ = 22950576.

The previous prime is 71983787. The next prime is 71983853. The reversal of 71983836 is 63838917.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71983791 and 71983800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12006 + ... + 16973.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^71983836 is an apocalyptic number.

It is an amenable number.

71983836 is an abundant number, since it is smaller than the sum of its proper divisors (122761764).

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

71983836 is a wasteful number, since it uses less digits than its factorization.

71983836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29015 (or 29007 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 71983836 is about 8484.3288479408. The cubic root of 71983836 is about 415.9856303592.

The spelling of 71983836 in words is "seventy-one million, nine hundred eighty-three thousand, eight hundred thirty-six".