400420304 has 20 divisors (see below), whose sum is σ = 800841600. Its totient is φ = 193751520.

The previous prime is 400420291. The next prime is 400420331. The reversal of 400420304 is 403024004.

400420304 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 403154 + ... + 404145.

It is an arithmetic number, because the mean of its divisors is an integer number (40042080).

Almost surely, 2^400420304 is an apocalyptic number.

It is an amenable number.

400420304 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400420304 is a wasteful number, since it uses less digits than its factorization.

400420304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807338 (or 807332 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400420304 is about 20010.5048412078. The cubic root of 400420304 is about 737.0642782538.

Adding to 400420304 its reverse (403024004), we get a palindrome (803444308).

The spelling of 400420304 in words is "four hundred million, four hundred twenty thousand, three hundred four".