243245904 has 80 divisors (see below), whose sum is σ = 721620480. Its totient is φ = 69828480.

The previous prime is 243245903. The next prime is 243245917. The reversal of 243245904 is 409542342.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243245903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2092 + ... + 22155.

It is an arithmetic number, because the mean of its divisors is an integer number (9020256).

Almost surely, 2^243245904 is an apocalyptic number.

243245904 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 243245904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360810240).

243245904 is an abundant number, since it is smaller than the sum of its proper divisors (478374576).

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

243245904 is a wasteful number, since it uses less digits than its factorization.

243245904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24288 (or 24282 counting only the distinct ones).

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

The square root of 243245904 is about 15596.3426481980. The cubic root of 243245904 is about 624.2355701631.

The spelling of 243245904 in words is "two hundred forty-three million, two hundred forty-five thousand, nine hundred four".