71999808 has 112 divisors (see below), whose sum is σ = 201046080. Its totient is φ = 22708224.

The previous prime is 71999803. The next prime is 71999819. The reversal of 71999808 is 80899917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71999803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372960 + ... + 373152.

Almost surely, 2^71999808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71999808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100523040).

71999808 is an abundant number, since it is smaller than the sum of its proper divisors (129046272).

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

71999808 is a wasteful number, since it uses less digits than its factorization.

71999808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 71999808 is about 8485.2700605225. The cubic root of 71999808 is about 416.0163948174.

The spelling of 71999808 in words is "seventy-one million, nine hundred ninety-nine thousand, eight hundred eight".