39868345944 has 96 divisors (see below), whose sum is σ = 123515028000. Its totient is φ = 11380525056.

The previous prime is 39868345903. The next prime is 39868345967. The reversal of 39868345944 is 44954386893.

39868345944 is a `hidden beast` number, since 3 + 9 + 8 + 6 + 8 + 34 + 594 + 4 = 666.

It is a super-2 number, since 2×39868345944² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 523272 + ... + 594600.

It is an arithmetic number, because the mean of its divisors is an integer number (1286614875).

Almost surely, 2^39868345944 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 39868345944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61757514000).

39868345944 is an abundant number, since it is smaller than the sum of its proper divisors (83646682056).

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

39868345944 is a wasteful number, since it uses less digits than its factorization.

39868345944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72457 (or 72450 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

The spelling of 39868345944 in words is "thirty-nine billion, eight hundred sixty-eight million, three hundred forty-five thousand, nine hundred forty-four".