71493384 has 32 divisors (see below), whose sum is σ = 186505920. Its totient is φ = 22794816.

The previous prime is 71493377. The next prime is 71493397. The reversal of 71493384 is 48339417.

It is a super-2 number, since 2×71493384² = 10222607911542912, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64207 + ... + 65310.

It is an arithmetic number, because the mean of its divisors is an integer number (5828310).

Almost surely, 2^71493384 is an apocalyptic number.

It is an amenable number.

71493384 is an abundant number, since it is smaller than the sum of its proper divisors (115012536).

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

71493384 is a wasteful number, since it uses less digits than its factorization.

71493384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129549 (or 129545 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 71493384 is about 8455.3760413124. The cubic root of 71493384 is about 415.0387228589.

The spelling of 71493384 in words is "seventy-one million, four hundred ninety-three thousand, three hundred eighty-four".