40423399 has 4 divisors (see below), whose sum is σ = 42801264. Its totient is φ = 38045536.

The previous prime is 40423387. The next prime is 40423421. The reversal of 40423399 is 99332404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40423399 - 2⁵ = 40423367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188907 + ... + 1188940.

It is an arithmetic number, because the mean of its divisors is an integer number (10700316).

Almost surely, 2^40423399 is an apocalyptic number.

40423399 is a deficient number, since it is larger than the sum of its proper divisors (2377865).

40423399 is a wasteful number, since it uses less digits than its factorization.

40423399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377864.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 40423399 is about 6357.9398392876. The cubic root of 40423399 is about 343.1976268484.

The spelling of 40423399 in words is "forty million, four hundred twenty-three thousand, three hundred ninety-nine".