4040643 has 4 divisors (see below), whose sum is σ = 5387528. Its totient is φ = 2693760.

The previous prime is 4040629. The next prime is 4040653. The reversal of 4040643 is 3460404.

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

It is not a de Polignac number, because 4040643 - 2⁴ = 4040627 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4040653) 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, 673438 + ... + 673443.

It is an arithmetic number, because the mean of its divisors is an integer number (1346882).

Almost surely, 2^4040643 is an apocalyptic number.

4040643 is a deficient number, since it is larger than the sum of its proper divisors (1346885).

4040643 is a wasteful number, since it uses less digits than its factorization.

4040643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346884.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4040643 is about 2010.1350700886. The cubic root of 4040643 is about 159.2759339744.

The spelling of 4040643 in words is "four million, forty thousand, six hundred forty-three".