40423019 has 8 divisors (see below), whose sum is σ = 49751520. Its totient is φ = 31982976.

The previous prime is 40423001. The next prime is 40423057. The reversal of 40423019 is 91032404.

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

It is a cyclic number.

It is not a de Polignac number, because 40423019 - 2⁸ = 40422763 is a prime.

It is a super-2 number, since 2×40423019² = 3268040930148722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40422985 and 40423003.

It is not an unprimeable number, because it can be changed into a prime (40423079) 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, 222014 + ... + 222195.

It is an arithmetic number, because the mean of its divisors is an integer number (6218940).

Almost surely, 2^40423019 is an apocalyptic number.

40423019 is a deficient number, since it is larger than the sum of its proper divisors (9328501).

40423019 is a wasteful number, since it uses less digits than its factorization.

40423019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444229.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40423019 is about 6357.9099553234. The cubic root of 40423019 is about 343.1965514358.

The spelling of 40423019 in words is "forty million, four hundred twenty-three thousand, nineteen".