243422440 has 16 divisors (see below), whose sum is σ = 547700580. Its totient is φ = 97368960.

The previous prime is 243422401. The next prime is 243422479. The reversal of 243422440 is 44224342.

It is an interprime number because it is at equal distance from previous prime (243422401) and next prime (243422479).

It can be written as a sum of positive squares in 2 ways, for example, as 243422404 + 36 = 15602^2 + 6^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3042741 + ... + 3042820.

Almost surely, 2^243422440 is an apocalyptic number.

243422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243422440 is an abundant number, since it is smaller than the sum of its proper divisors (304278140).

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

243422440 is a wasteful number, since it uses less digits than its factorization.

243422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085572 (or 6085568 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 243422440 is about 15602.0011536982. The cubic root of 243422440 is about 624.3865468774.

Adding to 243422440 its reverse (44224342), we get a palindrome (287646782).

The spelling of 243422440 in words is "two hundred forty-three million, four hundred twenty-two thousand, four hundred forty".