243949100 has 18 divisors (see below), whose sum is σ = 529369764. Its totient is φ = 97579600.

The previous prime is 243949081. The next prime is 243949171. The reversal of 243949100 is 1949342.

It is a happy number.

243949100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243949100² = 119022326781620000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1219646 + ... + 1219845.

Almost surely, 2^243949100 is an apocalyptic number.

243949100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243949100 is an abundant number, since it is smaller than the sum of its proper divisors (285420664).

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

243949100 is a wasteful number, since it uses less digits than its factorization.

243949100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439505 (or 2439498 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 243949100 is about 15618.8699975382. The cubic root of 243949100 is about 624.8365225773.

The spelling of 243949100 in words is "two hundred forty-three million, nine hundred forty-nine thousand, one hundred".