71994406 has 8 divisors (see below), whose sum is σ = 117809064. Its totient is φ = 32724720.

The previous prime is 71994397. The next prime is 71994413. The reversal of 71994406 is 60449917.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1636215 + ... + 1636258.

It is an arithmetic number, because the mean of its divisors is an integer number (14726133).

Almost surely, 2^71994406 is an apocalyptic number.

71994406 is a deficient number, since it is larger than the sum of its proper divisors (45814658).

71994406 is a wasteful number, since it uses less digits than its factorization.

71994406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272486.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 71994406 is about 8484.9517382246. The cubic root of 71994406 is about 416.0059902675.

The spelling of 71994406 in words is "seventy-one million, nine hundred ninety-four thousand, four hundred six".