400304406 has 64 divisors (see below), whose sum is σ = 883147968. Its totient is φ = 120434688.

The previous prime is 400304393. The next prime is 400304413. The reversal of 400304406 is 604403004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274776 + ... + 276228.

It is an arithmetic number, because the mean of its divisors is an integer number (13799187).

Almost surely, 2^400304406 is an apocalyptic number.

400304406 is an abundant number, since it is smaller than the sum of its proper divisors (482843562).

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

400304406 is a wasteful number, since it uses less digits than its factorization.

400304406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400304406 is about 20007.6087026911. The cubic root of 400304406 is about 736.9931592172.

The spelling of 400304406 in words is "four hundred million, three hundred four thousand, four hundred six".