400113232 has 40 divisors (see below), whose sum is σ = 809546400. Its totient is φ = 191329152.

The previous prime is 400113223. The next prime is 400113239. The reversal of 400113232 is 232311004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400113239) 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, 45619 + ... + 53677.

It is an arithmetic number, because the mean of its divisors is an integer number (20238660).

Almost surely, 2^400113232 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 400113232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404773200).

400113232 is an abundant number, since it is smaller than the sum of its proper divisors (409433168).

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

400113232 is a wasteful number, since it uses less digits than its factorization.

400113232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8203 (or 8197 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 400113232 is about 20002.8305996926. The cubic root of 400113232 is about 736.8758182112.

Adding to 400113232 its reverse (232311004), we get a palindrome (632424236).

The spelling of 400113232 in words is "four hundred million, one hundred thirteen thousand, two hundred thirty-two".