400309234 has 16 divisors (see below), whose sum is σ = 684692568. Its totient is φ = 173889792.

The previous prime is 400309223. The next prime is 400309241. The reversal of 400309234 is 432903004.

It can be written as a sum of positive squares in 4 ways, for example, as 304328025 + 95981209 = 17445^2 + 9797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400309199 and 400309208.

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 7 ways as a sum of consecutive naturals, for example, 452397 + ... + 453280.

Almost surely, 2^400309234 is an apocalyptic number.

400309234 is a deficient number, since it is larger than the sum of its proper divisors (284383334).

400309234 is a wasteful number, since it uses less digits than its factorization.

400309234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905709.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 400309234 is about 20007.7293564262. The cubic root of 400309234 is about 736.9961221196.

The spelling of 400309234 in words is "four hundred million, three hundred nine thousand, two hundred thirty-four".