71128332 has 72 divisors (see below), whose sum is σ = 199901520. Its totient is φ = 21141120.

The previous prime is 71128307. The next prime is 71128349. The reversal of 71128332 is 23382117.

It is a super-2 number, since 2×71128332² = 10118479226204448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71128296 and 71128305.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19294 + ... + 22682.

It is an arithmetic number, because the mean of its divisors is an integer number (2776410).

Almost surely, 2^71128332 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 71128332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99950760).

71128332 is an abundant number, since it is smaller than the sum of its proper divisors (128773188).

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

71128332 is a wasteful number, since it uses less digits than its factorization.

71128332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463 (or 3458 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 71128332 is about 8433.7614384093. The cubic root of 71128332 is about 414.3311080773.

The spelling of 71128332 in words is "seventy-one million, one hundred twenty-eight thousand, three hundred thirty-two".