40631443 has 16 divisors (see below), whose sum is σ = 44025120. Its totient is φ = 37380096.

The previous prime is 40631417. The next prime is 40631467. The reversal of 40631443 is 34413604.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40631443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40631743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157971 + ... + 158227.

It is an arithmetic number, because the mean of its divisors is an integer number (2751570).

Almost surely, 2^40631443 is an apocalyptic number.

40631443 is a deficient number, since it is larger than the sum of its proper divisors (3393677).

40631443 is a wasteful number, since it uses less digits than its factorization.

40631443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 40631443 is about 6374.2798024561. The cubic root of 40631443 is about 343.7853892821.

The spelling of 40631443 in words is "forty million, six hundred thirty-one thousand, four hundred forty-three".