71819478 has 48 divisors (see below), whose sum is σ = 165874176. Its totient is φ = 22405680.

The previous prime is 71819477. The next prime is 71819491. The reversal of 71819478 is 87491817.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71819471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17613 + ... + 21303.

It is an arithmetic number, because the mean of its divisors is an integer number (3455712).

Almost surely, 2^71819478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71819478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82937088).

71819478 is an abundant number, since it is smaller than the sum of its proper divisors (94054698).

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

71819478 is a wasteful number, since it uses less digits than its factorization.

71819478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769 (or 3766 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 71819478 is about 8474.6373373732. The cubic root of 71819478 is about 415.6687876153.

The spelling of 71819478 in words is "seventy-one million, eight hundred nineteen thousand, four hundred seventy-eight".