40401443 has 4 divisors (see below), whose sum is σ = 40473768. Its totient is φ = 40329120.

The previous prime is 40401433. The next prime is 40401451. The reversal of 40401443 is 34410404.

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 40401443 - 2⁸ = 40401187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40401433) 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, 35318 + ... + 36443.

It is an arithmetic number, because the mean of its divisors is an integer number (10118442).

Almost surely, 2^40401443 is an apocalyptic number.

40401443 is a deficient number, since it is larger than the sum of its proper divisors (72325).

40401443 is an equidigital number, since it uses as much as digits as its factorization.

40401443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72324.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40401443 is about 6356.2129448281. The cubic root of 40401443 is about 343.1354795777.

Adding to 40401443 its reverse (34410404), we get a palindrome (74811847).

The spelling of 40401443 in words is "forty million, four hundred one thousand, four hundred forty-three".