40781443 has 4 divisors (see below), whose sum is σ = 40870368. Its totient is φ = 40692520.

The previous prime is 40781431. The next prime is 40781473. The reversal of 40781443 is 34418704.

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

It is a cyclic number.

It is not a de Polignac number, because 40781443 - 2¹³ = 40773251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40781413) 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, 43771 + ... + 44692.

It is an arithmetic number, because the mean of its divisors is an integer number (10217592).

Almost surely, 2^40781443 is an apocalyptic number.

40781443 is a deficient number, since it is larger than the sum of its proper divisors (88925).

40781443 is an equidigital number, since it uses as much as digits as its factorization.

40781443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88924.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 40781443 is about 6386.0349983382. The cubic root of 40781443 is about 344.2079231329.

The spelling of 40781443 in words is "forty million, seven hundred eighty-one thousand, four hundred forty-three".