39944391 has 8 divisors (see below), whose sum is σ = 53472384. Its totient is φ = 26523000.

The previous prime is 39944371. The next prime is 39944393. The reversal of 39944391 is 19344993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39944391 - 2¹⁰ = 39943367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39944393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25771 + ... + 27276.

It is an arithmetic number, because the mean of its divisors is an integer number (6684048).

Almost surely, 2^39944391 is an apocalyptic number.

39944391 is a deficient number, since it is larger than the sum of its proper divisors (13527993).

39944391 is a wasteful number, since it uses less digits than its factorization.

39944391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53301.

The product of its digits is 104976, while the sum is 42.

The square root of 39944391 is about 6320.1575138599. The cubic root of 39944391 is about 341.8366324153.

It can be divided in two parts, 3994 and 4391, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 39944391 in words is "thirty-nine million, nine hundred forty-four thousand, three hundred ninety-one".