71990296 has 64 divisors (see below), whose sum is σ = 161582400. Its totient is φ = 29417472.

The previous prime is 71990287. The next prime is 71990333. The reversal of 71990296 is 69209917.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157300 + ... + 157756.

It is an arithmetic number, because the mean of its divisors is an integer number (2524725).

Almost surely, 2^71990296 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 71990296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80791200).

71990296 is an abundant number, since it is smaller than the sum of its proper divisors (89592104).

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

71990296 is a wasteful number, since it uses less digits than its factorization.

71990296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 71990296 is about 8484.7095412866. The cubic root of 71990296 is about 415.9980738323.

The spelling of 71990296 in words is "seventy-one million, nine hundred ninety thousand, two hundred ninety-six".