243636400 has 60 divisors (see below), whose sum is σ = 668963632. Its totient is φ = 83531520.

The previous prime is 243636377. The next prime is 243636431. The reversal of 243636400 is 4636342.

243636400 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 40707 + ... + 46306.

Almost surely, 2^243636400 is an apocalyptic number.

243636400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243636400 is an abundant number, since it is smaller than the sum of its proper divisors (425327232).

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

243636400 is a wasteful number, since it uses less digits than its factorization.

243636400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87038 (or 87027 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 243636400 is about 15608.8564603561. The cubic root of 243636400 is about 624.5694314453.

It can be divided in two parts, 243636 and 400, that added together give a square (244036 = 494²).

The spelling of 243636400 in words is "two hundred forty-three million, six hundred thirty-six thousand, four hundred".