71883920 has 20 divisors (see below), whose sum is σ = 167130300. Its totient is φ = 28753536.

The previous prime is 71883919. The next prime is 71883941. The reversal of 71883920 is 2938817.

It can be written as a sum of positive squares in 2 ways, for example, as 37356544 + 34527376 = 6112^2 + 5876^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 449195 + ... + 449354.

It is an arithmetic number, because the mean of its divisors is an integer number (8356515).

Almost surely, 2^71883920 is an apocalyptic number.

It is an amenable number.

71883920 is an abundant number, since it is smaller than the sum of its proper divisors (95246380).

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

71883920 is a wasteful number, since it uses less digits than its factorization.

71883920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898562 (or 898556 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 71883920 is about 8478.4385354852. The cubic root of 71883920 is about 415.7930738633.

The spelling of 71883920 in words is "seventy-one million, eight hundred eighty-three thousand, nine hundred twenty".