40423507 has 4 divisors (see below), whose sum is σ = 42551080. Its totient is φ = 38295936.

The previous prime is 40423459. The next prime is 40423517. The reversal of 40423507 is 70532404.

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 40423507 - 2⁷ = 40423379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40423517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063758 + ... + 1063795.

It is an arithmetic number, because the mean of its divisors is an integer number (10637770).

Almost surely, 2^40423507 is an apocalyptic number.

40423507 is a deficient number, since it is larger than the sum of its proper divisors (2127573).

40423507 is a wasteful number, since it uses less digits than its factorization.

40423507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127572.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 40423507 is about 6357.9483325991. The cubic root of 40423507 is about 343.1979324908.

The spelling of 40423507 in words is "forty million, four hundred twenty-three thousand, five hundred seven".