71639296 has 45 divisors (see below), whose sum is σ = 149498671. Its totient is φ = 34262272.

The previous prime is 71639279. The next prime is 71639299. The reversal of 71639296 is 69293617.

The square root of 71639296 is 8464.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It is a Duffinian number.

Its product of digits (122472) is a multiple of the sum of its prime factors (108).

It is not an unprimeable number, because it can be changed into a prime (71639299) by changing a digit.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 3114741 + ... + 3114763.

Almost surely, 2^71639296 is an apocalyptic number.

71639296 is the 8464-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71639296

71639296 is an abundant number, since it is smaller than the sum of its proper divisors (77859375).

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

71639296 is an frugal number, since it uses more digits than its factorization.

71639296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 25 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The cubic root of 71639296 is about 415.3208840636.

The spelling of 71639296 in words is "seventy-one million, six hundred thirty-nine thousand, two hundred ninety-six".