71071344 has 200 divisors, whose sum is σ = 223259520. Its totient is φ = 21772800.

The previous prime is 71071333. The next prime is 71071349. The reversal of 71071344 is 44317017.

It is a super-2 number, since 2×71071344² = 10102271875932672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71071349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1165074 + ... + 1165134.

Almost surely, 2^71071344 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 71071344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111629760).

71071344 is an abundant number, since it is smaller than the sum of its proper divisors (152188176).

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

71071344 is a wasteful number, since it uses less digits than its factorization.

71071344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 71071344 is about 8430.3821977417. The cubic root of 71071344 is about 414.2204245223.

The spelling of 71071344 in words is "seventy-one million, seventy-one thousand, three hundred forty-four".