39981933790 has 8 divisors (see below), whose sum is σ = 71967480840. Its totient is φ = 15992773512.

The previous prime is 39981933787. The next prime is 39981933841. The reversal of 39981933790 is 9733918993.

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, 1999096680 + ... + 1999096699.

It is an arithmetic number, because the mean of its divisors is an integer number (8995935105).

Almost surely, 2^39981933790 is an apocalyptic number.

39981933790 is a deficient number, since it is larger than the sum of its proper divisors (31985547050).

39981933790 is a wasteful number, since it uses less digits than its factorization.

39981933790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998193386.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The spelling of 39981933790 in words is "thirty-nine billion, nine hundred eighty-one million, nine hundred thirty-three thousand, seven hundred ninety".