71173272 has 64 divisors (see below), whose sum is σ = 184872960. Its totient is φ = 22809600.

The previous prime is 71173261. The next prime is 71173327. The reversal of 71173272 is 27237117.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201448 + ... + 201800.

It is an arithmetic number, because the mean of its divisors is an integer number (2888640).

Almost surely, 2^71173272 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 71173272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92436480).

71173272 is an abundant number, since it is smaller than the sum of its proper divisors (113699688).

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

71173272 is a wasteful number, since it uses less digits than its factorization.

71173272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 660 counting only the distinct ones).

The product of its digits is 4116, while the sum is 30.

The square root of 71173272 is about 8436.4253093357. The cubic root of 71173272 is about 414.4183500121.

The spelling of 71173272 in words is "seventy-one million, one hundred seventy-three thousand, two hundred seventy-two".