71481438 has 48 divisors (see below), whose sum is σ = 177571680. Its totient is φ = 20357568.

The previous prime is 71481419. The next prime is 71481461. The reversal of 71481438 is 83418417.

It is a zygodrome in base 3.

It is a congruent number.

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, 49308 + ... + 50736.

It is an arithmetic number, because the mean of its divisors is an integer number (3699410).

Almost surely, 2^71481438 is an apocalyptic number.

71481438 is an abundant number, since it is smaller than the sum of its proper divisors (106090242).

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

71481438 is a wasteful number, since it uses less digits than its factorization.

71481438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1838 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 71481438 is about 8454.6695973290. The cubic root of 71481438 is about 415.0156049680.

The spelling of 71481438 in words is "seventy-one million, four hundred eighty-one thousand, four hundred thirty-eight".