71421384 has 32 divisors (see below), whose sum is σ = 179658720. Its totient is φ = 23659776.

The previous prime is 71421373. The next prime is 71421419. The reversal of 71421384 is 48312417.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5217 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (5614335).

Almost surely, 2^71421384 is an apocalyptic number.

It is an amenable number.

71421384 is an abundant number, since it is smaller than the sum of its proper divisors (108237336).

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

71421384 is a wasteful number, since it uses less digits than its factorization.

71421384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18429 (or 18425 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 71421384 is about 8451.1173225793. The cubic root of 71421384 is about 414.8993494721.

The spelling of 71421384 in words is "seventy-one million, four hundred twenty-one thousand, three hundred eighty-four".