400334309 has 16 divisors (see below), whose sum is σ = 428613120. Its totient is φ = 372610560.

The previous prime is 400334273. The next prime is 400334327. The reversal of 400334309 is 903433004.

It is a cyclic number.

It is not a de Polignac number, because 400334309 - 2¹² = 400330213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400334509) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 835532 + ... + 836010.

It is an arithmetic number, because the mean of its divisors is an integer number (26788320).

Almost surely, 2^400334309 is an apocalyptic number.

It is an amenable number.

400334309 is a deficient number, since it is larger than the sum of its proper divisors (28278811).

400334309 is a wasteful number, since it uses less digits than its factorization.

400334309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 400334309 is about 20008.3559794402. The cubic root of 400334309 is about 737.0115100500.

The spelling of 400334309 in words is "four hundred million, three hundred thirty-four thousand, three hundred nine".