40001423 has 8 divisors (see below), whose sum is σ = 49872000. Its totient is φ = 31169880.

The previous prime is 40001407. The next prime is 40001443. The reversal of 40001423 is 32410004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40001423 - 2⁴ = 40001407 is a prime.

It is a super-2 number, since 2×40001423² = 3200227684049858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40001398 and 40001407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259673 + ... + 259826.

It is an arithmetic number, because the mean of its divisors is an integer number (6234000).

Almost surely, 2^40001423 is an apocalyptic number.

40001423 is a deficient number, since it is larger than the sum of its proper divisors (9870577).

40001423 is a wasteful number, since it uses less digits than its factorization.

40001423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519517.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40001423 is about 6324.6678173640. The cubic root of 40001423 is about 341.9992447802. Note that the first 3 decimals are identical.

Adding to 40001423 its reverse (32410004), we get a palindrome (72411427).

The spelling of 40001423 in words is "forty million, one thousand, four hundred twenty-three".