71478784 has 40 divisors (see below), whose sum is σ = 153818280. Its totient is φ = 32987136.

The previous prime is 71478769. The next prime is 71478809. The reversal of 71478784 is 48787417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287 + ... + 12025.

It is an arithmetic number, because the mean of its divisors is an integer number (3845457).

Almost surely, 2^71478784 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 71478784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76909140).

71478784 is an abundant number, since it is smaller than the sum of its proper divisors (82339496).

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

71478784 is a wasteful number, since it uses less digits than its factorization.

71478784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770 (or 10754 counting only the distinct ones).

The product of its digits is 351232, while the sum is 46.

The square root of 71478784 is about 8454.5126411875. The cubic root of 71478784 is about 415.0104685993.

It can be divided in two parts, 7147 and 8784, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 71478784 in words is "seventy-one million, four hundred seventy-eight thousand, seven hundred eighty-four".