40003907 has 8 divisors (see below), whose sum is σ = 42429600. Its totient is φ = 37586304.

The previous prime is 40003883. The next prime is 40003913. The reversal of 40003907 is 70930004.

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 40003907 - 2⁸ = 40003651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40003937) 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 7 ways as a sum of consecutive naturals, for example, 10394 + ... + 13712.

It is an arithmetic number, because the mean of its divisors is an integer number (5303700).

Almost surely, 2^40003907 is an apocalyptic number.

40003907 is a deficient number, since it is larger than the sum of its proper divisors (2425693).

40003907 is a wasteful number, since it uses less digits than its factorization.

40003907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 40003907 is about 6324.8641882652. The cubic root of 40003907 is about 342.0063237662.

The spelling of 40003907 in words is "forty million, three thousand, nine hundred seven".