400434311 has 4 divisors (see below), whose sum is σ = 400551000. Its totient is φ = 400317624.

The previous prime is 400434283. The next prime is 400434343. The reversal of 400434311 is 113434004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400434311 - 2¹⁰ = 400433287 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 (400434011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53036 + ... + 60113.

It is an arithmetic number, because the mean of its divisors is an integer number (100137750).

Almost surely, 2^400434311 is an apocalyptic number.

400434311 is a deficient number, since it is larger than the sum of its proper divisors (116689).

400434311 is a wasteful number, since it uses less digits than its factorization.

400434311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116688.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 400434311 is about 20010.8548293170. The cubic root of 400434311 is about 737.0728725058.

Adding to 400434311 its reverse (113434004), we get a palindrome (513868315).

The spelling of 400434311 in words is "four hundred million, four hundred thirty-four thousand, three hundred eleven".