400012113 has 16 divisors (see below), whose sum is σ = 570116736. Its totient is φ = 248856960.

The previous prime is 400012103. The next prime is 400012163. The reversal of 400012113 is 311210004.

It is a happy number.

It is not a de Polignac number, because 400012113 - 2⁶ = 400012049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400012103) 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, 67870 + ... + 73527.

It is an arithmetic number, because the mean of its divisors is an integer number (35632296).

Almost surely, 2^400012113 is an apocalyptic number.

It is an amenable number.

400012113 is a deficient number, since it is larger than the sum of its proper divisors (170104623).

400012113 is a wasteful number, since it uses less digits than its factorization.

400012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141464.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 400012113 is about 20000.3028227075. The cubic root of 400012113 is about 736.8137370986.

Adding to 400012113 its reverse (311210004), we get a palindrome (711222117).

The spelling of 400012113 in words is "four hundred million, twelve thousand, one hundred thirteen".