243298840 has 16 divisors (see below), whose sum is σ = 547422480. Its totient is φ = 97319520.

The previous prime is 243298829. The next prime is 243298841. The reversal of 243298840 is 48892342.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 6082471 = 243298840 / (2 + 4 + 3 + 2 + 9 + 8 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 243298793 and 243298802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243298841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3041196 + ... + 3041275.

It is an arithmetic number, because the mean of its divisors is an integer number (34213905).

Almost surely, 2^243298840 is an apocalyptic number.

243298840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243298840 is an abundant number, since it is smaller than the sum of its proper divisors (304123640).

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

243298840 is a wasteful number, since it uses less digits than its factorization.

243298840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082482 (or 6082478 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 243298840 is about 15598.0396204138. The cubic root of 243298840 is about 624.2808496338.

The spelling of 243298840 in words is "two hundred forty-three million, two hundred ninety-eight thousand, eight hundred forty".