243987498 has 64 divisors (see below), whose sum is σ = 563760000. Its totient is φ = 78124032.

The previous prime is 243987463. The next prime is 243987511. The reversal of 243987498 is 894789342.

243987498 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 (54).

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, 543178 + ... + 543626.

It is an arithmetic number, because the mean of its divisors is an integer number (8808750).

Almost surely, 2^243987498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243987498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281880000).

243987498 is an abundant number, since it is smaller than the sum of its proper divisors (319772502).

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

243987498 is a wasteful number, since it uses less digits than its factorization.

243987498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 830 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 243987498 is about 15620.0991674189. The cubic root of 243987498 is about 624.8693042984.

The spelling of 243987498 in words is "two hundred forty-three million, nine hundred eighty-seven thousand, four hundred ninety-eight".