71299172 has 48 divisors (see below), whose sum is σ = 156656640. Its totient is φ = 27685152.

The previous prime is 71299157. The next prime is 71299177. The reversal of 71299172 is 27199217.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (71299177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9323 + ... + 15149.

It is an arithmetic number, because the mean of its divisors is an integer number (3263680).

Almost surely, 2^71299172 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 71299172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78328320).

71299172 is an abundant number, since it is smaller than the sum of its proper divisors (85357468).

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

71299172 is a wasteful number, since it uses less digits than its factorization.

71299172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880 (or 5878 counting only the distinct ones).

The product of its digits is 15876, while the sum is 38.

The square root of 71299172 is about 8443.8837036046. The cubic root of 71299172 is about 414.6625640470.

The spelling of 71299172 in words is "seventy-one million, two hundred ninety-nine thousand, one hundred seventy-two".