40004643 has 32 divisors (see below), whose sum is σ = 63221760. Its totient is φ = 22026240.

The previous prime is 40004611. The next prime is 40004651. The reversal of 40004643 is 34640004.

It is not a de Polignac number, because 40004643 - 2⁵ = 40004611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40004603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83278 + ... + 83756.

It is an arithmetic number, because the mean of its divisors is an integer number (1975680).

Almost surely, 2^40004643 is an apocalyptic number.

40004643 is a deficient number, since it is larger than the sum of its proper divisors (23217117).

40004643 is a wasteful number, since it uses less digits than its factorization.

40004643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627.

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

The square root of 40004643 is about 6324.9223710651. The cubic root of 40004643 is about 342.0084211873.

Adding to 40004643 its reverse (34640004), we get a palindrome (74644647).

The spelling of 40004643 in words is "forty million, four thousand, six hundred forty-three".