400400400311 has 4 divisors (see below), whose sum is σ = 417809113392. Its totient is φ = 382991687232.

The previous prime is 400400400269. The next prime is 400400400349. The reversal of 400400400311 is 113004004004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400400400311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400400400311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400400408311) 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, 8704356506 + ... + 8704356551.

It is an arithmetic number, because the mean of its divisors is an integer number (104452278348).

Almost surely, 2^400400400311 is an apocalyptic number.

400400400311 is a deficient number, since it is larger than the sum of its proper divisors (17408713081).

400400400311 is a wasteful number, since it uses less digits than its factorization.

400400400311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17408713080.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 400400400311 its reverse (113004004004), we get a palindrome (513404404315).

The spelling of 400400400311 in words is "four hundred billion, four hundred million, four hundred thousand, three hundred eleven".