40023423 has 32 divisors (see below), whose sum is σ = 68497920. Its totient is φ = 22826880.

The previous prime is 40023419. The next prime is 40023433. The reversal of 40023423 is 32432004.

It is not a de Polignac number, because 40023423 - 2² = 40023419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40023396 and 40023405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1086 + ... + 9012.

It is an arithmetic number, because the mean of its divisors is an integer number (2140560).

Almost surely, 2^40023423 is an apocalyptic number.

40023423 is a deficient number, since it is larger than the sum of its proper divisors (28474497).

40023423 is a wasteful number, since it uses less digits than its factorization.

40023423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7964 (or 7958 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40023423 is about 6326.4068000722. The cubic root of 40023423 is about 342.0619309206.

Adding to 40023423 its reverse (32432004), we get a palindrome (72455427).

The spelling of 40023423 in words is "forty million, twenty-three thousand, four hundred twenty-three".