243432740 has 24 divisors (see below), whose sum is σ = 522087552. Its totient is φ = 95300960.

The previous prime is 243432737. The next prime is 243432743. The reversal of 243432740 is 47234342.

It is an interprime number because it is at equal distance from previous prime (243432737) and next prime (243432743).

It is not an unprimeable number, because it can be changed into a prime (243432743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128546 + ... + 130425.

It is an arithmetic number, because the mean of its divisors is an integer number (21753648).

Almost surely, 2^243432740 is an apocalyptic number.

243432740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243432740 is an abundant number, since it is smaller than the sum of its proper divisors (278654812).

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

243432740 is a wasteful number, since it uses less digits than its factorization.

243432740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259027 (or 259025 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 243432740 is about 15602.3312360685. The cubic root of 243432740 is about 624.3953533659.

The spelling of 243432740 in words is "two hundred forty-three million, four hundred thirty-two thousand, seven hundred forty".