400135104 has 84 divisors (see below), whose sum is σ = 1183965120. Its totient is φ = 129070080.

The previous prime is 400135097. The next prime is 400135123. The reversal of 400135104 is 401531004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6652 + ... + 29060.

Almost surely, 2^400135104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400135104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591982560).

400135104 is an abundant number, since it is smaller than the sum of its proper divisors (783830016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400135104 is a wasteful number, since it uses less digits than its factorization.

400135104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22458 (or 22445 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 400135104 is about 20003.3773148436. The cubic root of 400135104 is about 736.8892449555.

Adding to 400135104 its reverse (401531004), we get a palindrome (801666108).

The spelling of 400135104 in words is "four hundred million, one hundred thirty-five thousand, one hundred four".