243274540 has 24 divisors (see below), whose sum is σ = 511216272. Its totient is φ = 97245120.

The previous prime is 243274531. The next prime is 243274547. The reversal of 243274540 is 45472342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243274547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36895 + ... + 42985.

It is an arithmetic number, because the mean of its divisors is an integer number (21300678).

Almost surely, 2^243274540 is an apocalyptic number.

243274540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243274540 is an abundant number, since it is smaller than the sum of its proper divisors (267941732).

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

243274540 is a wasteful number, since it uses less digits than its factorization.

243274540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097 (or 8095 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 243274540 is about 15597.2606569231. The cubic root of 243274540 is about 624.2600651399.

The spelling of 243274540 in words is "two hundred forty-three million, two hundred seventy-four thousand, five hundred forty".