243340400 has 60 divisors (see below), whose sum is σ = 586125432. Its totient is φ = 97086720.

The previous prime is 243340399. The next prime is 243340417. The reversal of 243340400 is 4043342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 308807 + ... + 309593.

Almost surely, 2^243340400 is an apocalyptic number.

243340400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243340400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293062716).

243340400 is an abundant number, since it is smaller than the sum of its proper divisors (342785032).

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

243340400 is a wasteful number, since it uses less digits than its factorization.

243340400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 243340400 is about 15599.3717822225. The cubic root of 243340400 is about 624.3163938983.

Adding to 243340400 its reverse (4043342), we get a palindrome (247383742).

It can be divided in two parts, 243340 and 400, that multiplied together give a cube (97336000 = 460³).

The spelling of 243340400 in words is "two hundred forty-three million, three hundred forty thousand, four hundred".