39894046720 has 192 divisors, whose sum is σ = 105169428000. Its totient is φ = 14403502080.

The previous prime is 39894046691. The next prime is 39894046721. The reversal of 39894046720 is 2764049893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39894046721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16782172 + ... + 16784548.

Almost surely, 2^39894046720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39894046720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52584714000).

39894046720 is an abundant number, since it is smaller than the sum of its proper divisors (65275381280).

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

39894046720 is a wasteful number, since it uses less digits than its factorization.

39894046720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 39894046720 in words is "thirty-nine billion, eight hundred ninety-four million, forty-six thousand, seven hundred twenty".