400020334 has 16 divisors (see below), whose sum is σ = 686007936. Its totient is φ = 171372600.

The previous prime is 400020323. The next prime is 400020343. The reversal of 400020334 is 433020004.

It is a super-2 number, since 2×400020334² = 320032535226943112, which contains 22 as substring.

It is a congruent number.

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, 62629 + ... + 68719.

It is an arithmetic number, because the mean of its divisors is an integer number (42875496).

Almost surely, 2^400020334 is an apocalyptic number.

400020334 is a deficient number, since it is larger than the sum of its proper divisors (285987602).

400020334 is a wasteful number, since it uses less digits than its factorization.

400020334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10791.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400020334 is about 20000.5083435397. The cubic root of 400020334 is about 736.8187846993.

Adding to 400020334 its reverse (433020004), we get a palindrome (833040338).

The spelling of 400020334 in words is "four hundred million, twenty thousand, three hundred thirty-four".