400445113 has 4 divisors (see below), whose sum is σ = 402457600. Its totient is φ = 398432628.

The previous prime is 400445107. The next prime is 400445119. The reversal of 400445113 is 311544004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (400445107) and next prime (400445119).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400445113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400445119) 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 3 ways as a sum of consecutive naturals, for example, 1005945 + ... + 1006342.

It is an arithmetic number, because the mean of its divisors is an integer number (100614400).

Almost surely, 2^400445113 is an apocalyptic number.

It is an amenable number.

400445113 is a deficient number, since it is larger than the sum of its proper divisors (2012487).

400445113 is a wasteful number, since it uses less digits than its factorization.

400445113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012486.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 400445113 is about 20011.1247310090. The cubic root of 400445113 is about 737.0795001343.

Adding to 400445113 its reverse (311544004), we get a palindrome (711989117).

The spelling of 400445113 in words is "four hundred million, four hundred forty-five thousand, one hundred thirteen".