243709494 has 64 divisors (see below), whose sum is σ = 573737472. Its totient is φ = 67564800.

The previous prime is 243709483. The next prime is 243709511. The reversal of 243709494 is 494907342.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528424 + ... + 528884.

It is an arithmetic number, because the mean of its divisors is an integer number (8964648).

Almost surely, 2^243709494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243709494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286868736).

243709494 is an abundant number, since it is smaller than the sum of its proper divisors (330027978).

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

243709494 is a wasteful number, since it uses less digits than its factorization.

243709494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 243709494 is about 15611.1977118990. The cubic root of 243709494 is about 624.6318847751.

The spelling of 243709494 in words is "two hundred forty-three million, seven hundred nine thousand, four hundred ninety-four".