206401236 has 48 divisors (see below), whose sum is σ = 500048640. Its totient is φ = 66183040.

The previous prime is 206401229. The next prime is 206401243. The reversal of 206401236 is 632104602.

It is an interprime number because it is at equal distance from previous prime (206401229) and next prime (206401243).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109381 + ... + 111251.

It is an arithmetic number, because the mean of its divisors is an integer number (10417680).

Almost surely, 2^206401236 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 206401236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250024320).

206401236 is an abundant number, since it is smaller than the sum of its proper divisors (293647404).

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

206401236 is a wasteful number, since it uses less digits than its factorization.

206401236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2222 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 206401236 is about 14366.6710131471. The cubic root of 206401236 is about 590.9772523962.

Adding to 206401236 its reverse (632104602), we get a palindrome (838505838).

The spelling of 206401236 in words is "two hundred six million, four hundred one thousand, two hundred thirty-six".