400440115 has 8 divisors (see below), whose sum is σ = 483406560. Its totient is φ = 318433152.

The previous prime is 400440109. The next prime is 400440119. The reversal of 400440115 is 511044004.

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 400440115 - 2³ = 400440107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400440092 and 400440101.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238950 + ... + 240619.

It is an arithmetic number, because the mean of its divisors is an integer number (60425820).

Almost surely, 2^400440115 is an apocalyptic number.

400440115 is a deficient number, since it is larger than the sum of its proper divisors (82966445).

400440115 is a wasteful number, since it uses less digits than its factorization.

400440115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479741.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 400440115 is about 20010.9998500825. Note that the first 3 decimals coincide. The cubic root of 400440115 is about 737.0764335978.

Adding to 400440115 its reverse (511044004), we get a palindrome (911484119).

The spelling of 400440115 in words is "four hundred million, four hundred forty thousand, one hundred fifteen".