400203207 has 8 divisors (see below), whose sum is σ = 592893680. Its totient is φ = 266802120.

The previous prime is 400203203. The next prime is 400203217. The reversal of 400203207 is 702302004.

It is a happy number.

It is not a de Polignac number, because 400203207 - 2² = 400203203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400203207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400203203) 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 7 ways as a sum of consecutive naturals, for example, 7411144 + ... + 7411197.

It is an arithmetic number, because the mean of its divisors is an integer number (74111710).

Almost surely, 2^400203207 is an apocalyptic number.

400203207 is a deficient number, since it is larger than the sum of its proper divisors (192690473).

400203207 is a wasteful number, since it uses less digits than its factorization.

400203207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822350 (or 14822344 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 400203207 is about 20005.0795299594. The cubic root of 400203207 is about 736.9310487704.

The spelling of 400203207 in words is "four hundred million, two hundred three thousand, two hundred seven".