400304420 has 48 divisors (see below), whose sum is σ = 881798400. Its totient is φ = 152355456.

The previous prime is 400304419. The next prime is 400304447. The reversal of 400304420 is 24403004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89354 + ... + 93726.

It is an arithmetic number, because the mean of its divisors is an integer number (18370800).

Almost surely, 2^400304420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400304420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440899200).

400304420 is an abundant number, since it is smaller than the sum of its proper divisors (481493980).

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

400304420 is a wasteful number, since it uses less digits than its factorization.

400304420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604 (or 4602 counting only the distinct ones).

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

The square root of 400304420 is about 20007.6090525580. The cubic root of 400304420 is about 736.9931678089.

Adding to 400304420 its reverse (24403004), we get a palindrome (424707424).

The spelling of 400304420 in words is "four hundred million, three hundred four thousand, four hundred twenty".