240003999 has 16 divisors (see below), whose sum is σ = 355801600. Its totient is φ = 159894648.

The previous prime is 240003997. The next prime is 240004007. The reversal of 240003999 is 999300042.

It is not a de Polignac number, because 240003999 - 2¹ = 240003997 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 (240003997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70122 + ... + 73464.

It is an arithmetic number, because the mean of its divisors is an integer number (22237600).

Almost surely, 2^240003999 is an apocalyptic number.

240003999 is a deficient number, since it is larger than the sum of its proper divisors (115797601).

240003999 is a wasteful number, since it uses less digits than its factorization.

240003999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011 (or 6005 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 240003999 is about 15492.0624514620. The cubic root of 240003999 is about 621.4499527890.

The spelling of 240003999 in words is "two hundred forty million, three thousand, nine hundred ninety-nine".