243525840 has 160 divisors (see below), whose sum is σ = 795591936. Its totient is φ = 61501440.

The previous prime is 243525839. The next prime is 243525851. The reversal of 243525840 is 48525342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866500 + ... + 866780.

Almost surely, 2^243525840 is an apocalyptic number.

243525840 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 243525840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397795968).

243525840 is an abundant number, since it is smaller than the sum of its proper divisors (552066096).

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

243525840 is a wasteful number, since it uses less digits than its factorization.

243525840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 243525840 is about 15605.3144793689. The cubic root of 243525840 is about 624.4749424936.

The spelling of 243525840 in words is "two hundred forty-three million, five hundred twenty-five thousand, eight hundred forty".