400210011 has 16 divisors (see below), whose sum is σ = 595983520. Its totient is φ = 265420800.

The previous prime is 400210007. The next prime is 400210043. The reversal of 400210011 is 110012004.

It is a happy number.

It is not a de Polignac number, because 400210011 - 2² = 400210007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400209975 and 400210002.

It is not an unprimeable number, because it can be changed into a prime (400210001) 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, 33190 + ... + 43611.

It is an arithmetic number, because the mean of its divisors is an integer number (37248970).

Almost surely, 2^400210011 is an apocalyptic number.

400210011 is a deficient number, since it is larger than the sum of its proper divisors (195773509).

400210011 is a wasteful number, since it uses less digits than its factorization.

400210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77003 (or 76997 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 400210011 is about 20005.2495860462. The cubic root of 400210011 is about 736.9352250241.

Adding to 400210011 its reverse (110012004), we get a palindrome (510222015).

The spelling of 400210011 in words is "four hundred million, two hundred ten thousand, eleven".