400233009 has 16 divisors (see below), whose sum is σ = 590849280. Its totient is φ = 238943760.

The previous prime is 400232999. The next prime is 400233037. The reversal of 400233009 is 900332004.

It is not a de Polignac number, because 400233009 - 2⁴ = 400232993 is a prime.

It is a super-2 number, since 2×400233009² = 320372922986388162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400233079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88299 + ... + 92720.

It is an arithmetic number, because the mean of its divisors is an integer number (36928080).

Almost surely, 2^400233009 is an apocalyptic number.

It is an amenable number.

400233009 is a deficient number, since it is larger than the sum of its proper divisors (190616271).

400233009 is a wasteful number, since it uses less digits than its factorization.

400233009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181100.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 400233009 is about 20005.8243769158. The cubic root of 400233009 is about 736.9493407061.

The spelling of 400233009 in words is "four hundred million, two hundred thirty-three thousand, nine".