243249408 has 108 divisors (see below), whose sum is σ = 711704448. Its totient is φ = 79887360.

The previous prime is 243249397. The next prime is 243249431. The reversal of 243249408 is 804942342.

243249408 is a `hidden beast` number, since 2 + 4 + 3 + 249 + 408 = 666.

243249408 is digitally balanced in base 2, 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 (36).

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, 162841 + ... + 164327.

It is an arithmetic number, because the mean of its divisors is an integer number (6589856).

Almost surely, 2^243249408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243249408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355852224).

243249408 is an abundant number, since it is smaller than the sum of its proper divisors (468455040).

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

243249408 is a wasteful number, since it uses less digits than its factorization.

243249408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 243249408 is about 15596.4549818220. The cubic root of 243249408 is about 624.2385675564.

The spelling of 243249408 in words is "two hundred forty-three million, two hundred forty-nine thousand, four hundred eight".