39940441 has 4 divisors (see below), whose sum is σ = 40389300. Its totient is φ = 39491584.

The previous prime is 39940409. The next prime is 39940469. The reversal of 39940441 is 14404993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2547216 + 37393225 = 1596^2 + 6115^2 .

It is a cyclic number.

It is not a de Polignac number, because 39940441 - 2⁵ = 39940409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39940397 and 39940406.

It is not an unprimeable number, because it can be changed into a prime (39940141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224296 + ... + 224473.

It is an arithmetic number, because the mean of its divisors is an integer number (10097325).

Almost surely, 2^39940441 is an apocalyptic number.

It is an amenable number.

39940441 is a deficient number, since it is larger than the sum of its proper divisors (448859).

39940441 is an equidigital number, since it uses as much as digits as its factorization.

39940441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448858.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 39940441 is about 6319.8450139224. The cubic root of 39940441 is about 341.8253642566.

Adding to 39940441 its product of nonzero digits (15552), we get a palindrome (39955993).

The spelling of 39940441 in words is "thirty-nine million, nine hundred forty thousand, four hundred forty-one".