71930944 has 42 divisors (see below), whose sum is σ = 151667210. Its totient is φ = 33841152.

The previous prime is 71930939. The next prime is 71930983. The reversal of 71930944 is 44903917.

It can be written as a sum of positive squares in 3 ways, for example, as 37356544 + 34574400 = 6112^2 + 5880^2 .

It is a super-2 number, since 2×71930944² = 10348121409462272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16552 + ... + 20440.

Almost surely, 2^71930944 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 71930944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75833605).

71930944 is an abundant number, since it is smaller than the sum of its proper divisors (79736266).

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

71930944 is a wasteful number, since it uses less digits than its factorization.

71930944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935 (or 3908 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 71930944 is about 8481.2112342519. The cubic root of 71930944 is about 415.8837199660.

The spelling of 71930944 in words is "seventy-one million, nine hundred thirty thousand, nine hundred forty-four".