400000404007 has 4 divisors (see below), whose sum is σ = 400376698960. Its totient is φ = 399624109056.

The previous prime is 400000403983. The next prime is 400000404077. The reversal of 400000404007 is 700404000004.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400000404007 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 (400000404077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188145882 + ... + 188148007.

It is an arithmetic number, because the mean of its divisors is an integer number (100094174740).

Almost surely, 2^400000404007 is an apocalyptic number.

400000404007 is a deficient number, since it is larger than the sum of its proper divisors (376294953).

400000404007 is a wasteful number, since it uses less digits than its factorization.

400000404007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376294952.

The product of its (nonzero) digits is 448, while the sum is 19.

The spelling of 400000404007 in words is "four hundred billion, four hundred four thousand, seven".