400236 has 12 divisors (see below), whose sum is σ = 933912. Its totient is φ = 133408.

The previous prime is 400217. The next prime is 400237. The reversal of 400236 is 632004.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (400237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16665 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (77826).

2⁴⁰⁰²³⁶ is an apocalyptic number.

It is an amenable number.

400236 is an abundant number, since it is smaller than the sum of its proper divisors (533676).

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

400236 is a wasteful number, since it uses less digits than its factorization.

400236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33360 (or 33358 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400236 is about 632.6420789040. The cubic root of 400236 is about 73.6951176478.

It can be divided in two parts, 400 and 236, that added together give a palindrome (636).

The spelling of 400236 in words is "four hundred thousand, two hundred thirty-six".