39991622 has 8 divisors (see below), whose sum is σ = 65440872. Its totient is φ = 18178000.

The previous prime is 39991619. The next prime is 39991669. The reversal of 39991622 is 22619993.

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 39991622.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 908879 + ... + 908922.

It is an arithmetic number, because the mean of its divisors is an integer number (8180109).

Almost surely, 2^39991622 is an apocalyptic number.

39991622 is a deficient number, since it is larger than the sum of its proper divisors (25449250).

39991622 is a wasteful number, since it uses less digits than its factorization.

39991622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817814.

The product of its digits is 52488, while the sum is 41.

The square root of 39991622 is about 6323.8929465955. The cubic root of 39991622 is about 341.9713107040.

The spelling of 39991622 in words is "thirty-nine million, nine hundred ninety-one thousand, six hundred twenty-two".