39944390 has 16 divisors (see below), whose sum is σ = 76129632. Its totient is φ = 15037824.

The previous prime is 39944371. The next prime is 39944393. The reversal of 39944390 is 9344993.

It is a happy number.

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, 117314 + ... + 117653.

It is an arithmetic number, because the mean of its divisors is an integer number (4758102).

Almost surely, 2^39944390 is an apocalyptic number.

39944390 is a deficient number, since it is larger than the sum of its proper divisors (36185242).

39944390 is a wasteful number, since it uses less digits than its factorization.

39944390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234991.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 39944390 is about 6320.1574347480. The cubic root of 39944390 is about 341.8366295627.

The spelling of 39944390 in words is "thirty-nine million, nine hundred forty-four thousand, three hundred ninety".