243639948 has 12 divisors (see below), whose sum is σ = 568493240. Its totient is φ = 81213312.

The previous prime is 243639889. The next prime is 243639967. The reversal of 243639948 is 849936342.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×243639948² = 118720848522885408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243639897 and 243639906.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10151653 + ... + 10151676.

Almost surely, 2^243639948 is an apocalyptic number.

It is an amenable number.

243639948 is an abundant number, since it is smaller than the sum of its proper divisors (324853292).

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

243639948 is a wasteful number, since it uses less digits than its factorization.

243639948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20303336 (or 20303334 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 243639948 is about 15608.9701133675. The cubic root of 243639948 is about 624.5724632331.

The spelling of 243639948 in words is "two hundred forty-three million, six hundred thirty-nine thousand, nine hundred forty-eight".