400004264 has 32 divisors (see below), whose sum is σ = 861256800. Its totient is φ = 172249920.

The previous prime is 400004257. The next prime is 400004291. The reversal of 400004264 is 462400004.

It is a super-2 number, since 2×400004264² = 320006822436363392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117947 + ... + 121290.

It is an arithmetic number, because the mean of its divisors is an integer number (26914275).

Almost surely, 2^400004264 is an apocalyptic number.

400004264 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400004264 is an abundant number, since it is smaller than the sum of its proper divisors (461252536).

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

400004264 is a wasteful number, since it uses less digits than its factorization.

400004264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239273 (or 239269 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400004264 is about 20000.1065997159. The cubic root of 400004264 is about 736.8089178372.

Adding to 400004264 its reverse (462400004), we get a palindrome (862404268).

The spelling of 400004264 in words is "four hundred million, four thousand, two hundred sixty-four".