243425664 has 96 divisors (see below), whose sum is σ = 719540640. Its totient is φ = 78935040.

The previous prime is 243425657. The next prime is 243425717. The reversal of 243425664 is 466524342.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×243425664³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 39769 + ... + 45479.

It is an arithmetic number, because the mean of its divisors is an integer number (7495215).

Almost surely, 2^243425664 is an apocalyptic number.

243425664 is a gapful number since it is divisible by the number (24) 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 243425664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359770320).

243425664 is an abundant number, since it is smaller than the sum of its proper divisors (476114976).

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

243425664 is a wasteful number, since it uses less digits than its factorization.

243425664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768 (or 5753 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 243425664 is about 15602.1044734356. The cubic root of 243425664 is about 624.3893034205.

The spelling of 243425664 in words is "two hundred forty-three million, four hundred twenty-five thousand, six hundred sixty-four".