71004312 has 96 divisors (see below), whose sum is σ = 204703200. Its totient is φ = 22184448.

The previous prime is 71004301. The next prime is 71004319. The reversal of 71004312 is 21340017.

It is a super-2 number, since 2×71004312² = 10083224645186688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71004319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87364 + ... + 88172.

It is an arithmetic number, because the mean of its divisors is an integer number (2132325).

Almost surely, 2^71004312 is an apocalyptic number.

71004312 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 71004312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102351600).

71004312 is an abundant number, since it is smaller than the sum of its proper divisors (133698888).

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

71004312 is a wasteful number, since it uses less digits than its factorization.

71004312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71004312 is about 8426.4056394171. The cubic root of 71004312 is about 414.0901574985.

Adding to 71004312 its reverse (21340017), we get a palindrome (92344329).

The spelling of 71004312 in words is "seventy-one million, four thousand, three hundred twelve".