71982394 has 8 divisors (see below), whose sum is σ = 117789408. Its totient is φ = 32719260.

The previous prime is 71982367. The next prime is 71982409. The reversal of 71982394 is 49328917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 71982394.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1635942 + ... + 1635985.

It is an arithmetic number, because the mean of its divisors is an integer number (14723676).

Almost surely, 2^71982394 is an apocalyptic number.

71982394 is a deficient number, since it is larger than the sum of its proper divisors (45807014).

71982394 is a wasteful number, since it uses less digits than its factorization.

71982394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271940.

The product of its digits is 108864, while the sum is 43.

The square root of 71982394 is about 8484.2438673107. The cubic root of 71982394 is about 415.9828526278.

It can be divided in two parts, 719823 and 94, that added together give a palindrome (719917).

The spelling of 71982394 in words is "seventy-one million, nine hundred eighty-two thousand, three hundred ninety-four".