40423705 has 16 divisors (see below), whose sum is σ = 58700160. Its totient is φ = 26088192.

The previous prime is 40423703. The next prime is 40423717. The reversal of 40423705 is 50732404.

It is a cyclic number.

It is not a de Polignac number, because 40423705 - 2¹ = 40423703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40423705.

It is not an unprimeable number, because it can be changed into a prime (40423703) 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 15 ways as a sum of consecutive naturals, for example, 33375 + ... + 34564.

It is an arithmetic number, because the mean of its divisors is an integer number (3668760).

Almost surely, 2^40423705 is an apocalyptic number.

It is an amenable number.

40423705 is a deficient number, since it is larger than the sum of its proper divisors (18276455).

40423705 is a wasteful number, since it uses less digits than its factorization.

40423705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67968.

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

The square root of 40423705 is about 6357.9639036409. The cubic root of 40423705 is about 343.1984928337.

The spelling of 40423705 in words is "forty million, four hundred twenty-three thousand, seven hundred five".