39921303444 has 96 divisors (see below), whose sum is σ = 102875136000. Its totient is φ = 11948549760.

The previous prime is 39921303431. The next prime is 39921303463. The reversal of 39921303444 is 44430312993.

It is a super-4 number, since 4×39921303444⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 39921303396 and 39921303405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3833757 + ... + 3844155.

It is an arithmetic number, because the mean of its divisors is an integer number (1071616000).

Almost surely, 2^39921303444 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 39921303444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51437568000).

39921303444 is an abundant number, since it is smaller than the sum of its proper divisors (62953832556).

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

39921303444 is a wasteful number, since it uses less digits than its factorization.

39921303444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773 (or 10771 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 39921303444 in words is "thirty-nine billion, nine hundred twenty-one million, three hundred three thousand, four hundred forty-four".