400440113 has 8 divisors (see below), whose sum is σ = 419022336. Its totient is φ = 382212000.

The previous prime is 400440109. The next prime is 400440119. The reversal of 400440113 is 311044004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400440113 - 2² = 400440109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400440091 and 400440100.

It is not an unprimeable number, because it can be changed into a prime (400440119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86213 + ... + 90738.

It is an arithmetic number, because the mean of its divisors is an integer number (52377792).

Almost surely, 2^400440113 is an apocalyptic number.

It is an amenable number.

400440113 is a deficient number, since it is larger than the sum of its proper divisors (18582223).

400440113 is a wasteful number, since it uses less digits than its factorization.

400440113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177055.

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

The square root of 400440113 is about 20010.9998001099. Note that the first 3 decimals coincide. The cubic root of 400440113 is about 737.0764323707.

Adding to 400440113 its reverse (311044004), we get a palindrome (711484117).

The spelling of 400440113 in words is "four hundred million, four hundred forty thousand, one hundred thirteen".