71342784 has 84 divisors (see below), whose sum is σ = 211592160. Its totient is φ = 22955520.

The previous prime is 71342759. The next prime is 71342801. The reversal of 71342784 is 48724317.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14569 + ... + 18839.

Almost surely, 2^71342784 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 71342784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105796080).

71342784 is an abundant number, since it is smaller than the sum of its proper divisors (140249376).

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

71342784 is a wasteful number, since it uses less digits than its factorization.

71342784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318 (or 4305 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 71342784 is about 8446.4657697761. The cubic root of 71342784 is about 414.7470932088.

The spelling of 71342784 in words is "seventy-one million, three hundred forty-two thousand, seven hundred eighty-four".