40440043 has 10 divisors (see below), whose sum is σ = 47180044. Its totient is φ = 34660836.

The previous prime is 40440019. The next prime is 40440077. The reversal of 40440043 is 34004404.

It is not a de Polignac number, because 40440043 - 2¹⁷ = 40308971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40440043.

It is not an unprimeable number, because it can be changed into a prime (40440013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6021 + ... + 10822.

Almost surely, 2^40440043 is an apocalyptic number.

40440043 is a deficient number, since it is larger than the sum of its proper divisors (6740001).

40440043 is an frugal number, since it uses more digits than its factorization.

40440043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16871 (or 16850 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40440043 is about 6359.2486191373. The cubic root of 40440043 is about 343.2447233127.

Adding to 40440043 its reverse (34004404), we get a palindrome (74444447).

The spelling of 40440043 in words is "forty million, four hundred forty thousand, forty-three".