243925440 has 112 divisors (see below), whose sum is σ = 844905600. Its totient is φ = 59130880.

The previous prime is 243925433. The next prime is 243925483. The reversal of 243925440 is 44529342.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 990 + ... + 22109.

It is an arithmetic number, because the mean of its divisors is an integer number (7543800).

Almost surely, 2^243925440 is an apocalyptic number.

243925440 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 243925440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422452800).

243925440 is an abundant number, since it is smaller than the sum of its proper divisors (600980160).

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

243925440 is a wasteful number, since it uses less digits than its factorization.

243925440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23130 (or 23120 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 243925440 is about 15618.1125620223. The cubic root of 243925440 is about 624.8163214915.

The spelling of 243925440 in words is "two hundred forty-three million, nine hundred twenty-five thousand, four hundred forty".