400534113 has 16 divisors (see below), whose sum is σ = 620345216. Its totient is φ = 225123840.

The previous prime is 400534097. The next prime is 400534129. The reversal of 400534113 is 311435004.

It is an interprime number because it is at equal distance from previous prime (400534097) and next prime (400534129).

It is not a de Polignac number, because 400534113 - 2⁴ = 400534097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400534113.

It is not an unprimeable number, because it can be changed into a prime (400534133) 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, 155056 + ... + 157617.

It is an arithmetic number, because the mean of its divisors is an integer number (38771576).

Almost surely, 2^400534113 is an apocalyptic number.

It is an amenable number.

400534113 is a deficient number, since it is larger than the sum of its proper divisors (219811103).

400534113 is a wasteful number, since it uses less digits than its factorization.

400534113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312744.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 400534113 is about 20013.3483705251. The cubic root of 400534113 is about 737.1341020544.

Adding to 400534113 its reverse (311435004), we get a palindrome (711969117).

The spelling of 400534113 in words is "four hundred million, five hundred thirty-four thousand, one hundred thirteen".