400040304 has 20 divisors (see below), whose sum is σ = 1033437576. Its totient is φ = 133346752.

The previous prime is 400040299. The next prime is 400040323. The reversal of 400040304 is 403040004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4167039 + ... + 4167134.

Almost surely, 2^400040304 is an apocalyptic number.

It is an amenable number.

400040304 is an abundant number, since it is smaller than the sum of its proper divisors (633397272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400040304 is a wasteful number, since it uses less digits than its factorization.

400040304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334184 (or 8334178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400040304 is about 20001.0075746198. The cubic root of 400040304 is about 736.8310457645.

Adding to 400040304 its reverse (403040004), we get a palindrome (803080308).

The spelling of 400040304 in words is "four hundred million, forty thousand, three hundred four".