243401900 has 36 divisors (see below), whose sum is σ = 603638448. Its totient is φ = 83451840.

The previous prime is 243401881. The next prime is 243401911. The reversal of 243401900 is 9104342.

It is a super-2 number, since 2×243401900² = 118488969847220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173159 + ... + 174558.

Almost surely, 2^243401900 is an apocalyptic number.

243401900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243401900 is an abundant number, since it is smaller than the sum of its proper divisors (360236548).

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

243401900 is a wasteful number, since it uses less digits than its factorization.

243401900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347738 (or 347731 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 243401900 is about 15601.3428909181. The cubic root of 243401900 is about 624.3689844588.

The spelling of 243401900 in words is "two hundred forty-three million, four hundred one thousand, nine hundred".