40004923 has 6 divisors (see below), whose sum is σ = 46536396. Its totient is φ = 34289892.

The previous prime is 40004917. The next prime is 40004947. The reversal of 40004923 is 32940004.

It is not a de Polignac number, because 40004923 - 2²⁵ = 6450491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40004894 and 40004903.

It is not an unprimeable number, because it can be changed into a prime (40004903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408165 + ... + 408262.

It is an arithmetic number, because the mean of its divisors is an integer number (7756066).

Almost surely, 2^40004923 is an apocalyptic number.

40004923 is a deficient number, since it is larger than the sum of its proper divisors (6531473).

40004923 is an equidigital number, since it uses as much as digits as its factorization.

40004923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816441 (or 816434 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40004923 is about 6324.9445056854. The cubic root of 40004923 is about 342.0092191124.

Adding to 40004923 its reverse (32940004), we get a palindrome (72944927).

The spelling of 40004923 in words is "forty million, four thousand, nine hundred twenty-three".