400011311 has 16 divisors (see below), whose sum is σ = 464537664. Its totient is φ = 337353984.

The previous prime is 400011307. The next prime is 400011323. The reversal of 400011311 is 113110004.

It is a cyclic number.

It is not a de Polignac number, because 400011311 - 2² = 400011307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400011292 and 400011301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400013311) 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, 312605 + ... + 313881.

It is an arithmetic number, because the mean of its divisors is an integer number (29033604).

Almost surely, 2^400011311 is an apocalyptic number.

400011311 is a deficient number, since it is larger than the sum of its proper divisors (64526353).

400011311 is a wasteful number, since it uses less digits than its factorization.

400011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 400011311 is about 20000.2827730010. The cubic root of 400011311 is about 736.8132446760.

Adding to 400011311 its reverse (113110004), we get a palindrome (513121315).

The spelling of 400011311 in words is "four hundred million, eleven thousand, three hundred eleven".