236406 has 24 divisors (see below), whose sum is σ = 500472. Its totient is φ = 74400.

The previous prime is 236399. The next prime is 236407. The reversal of 236406 is 604632.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 236406.

It is not an unprimeable number, because it can be changed into a prime (236407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5746 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (20853).

2²³⁶⁴⁰⁶ is an apocalyptic number.

236406 is an abundant number, since it is smaller than the sum of its proper divisors (264066).

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

236406 is a wasteful number, since it uses less digits than its factorization.

236406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 236406 is about 486.2160013821. The cubic root of 236406 is about 61.8328832865.

The spelling of 236406 in words is "two hundred thirty-six thousand, four hundred six".