71445312 has 84 divisors (see below), whose sum is σ = 207788256. Its totient is φ = 23466240.

The previous prime is 71445307. The next prime is 71445371. The reversal of 71445312 is 21354417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40023 + ... + 41769.

Almost surely, 2^71445312 is an apocalyptic number.

71445312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71445312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103894128).

71445312 is an abundant number, since it is smaller than the sum of its proper divisors (136342944).

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

71445312 is a wasteful number, since it uses less digits than its factorization.

71445312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836 (or 1823 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 71445312 is about 8452.5328748252. The cubic root of 71445312 is about 414.9456782820.

Adding to 71445312 its reverse (21354417), we get a palindrome (92799729).

The spelling of 71445312 in words is "seventy-one million, four hundred forty-five thousand, three hundred twelve".