243678136 has 32 divisors (see below), whose sum is σ = 520989840. Its totient is φ = 105850368.

The previous prime is 243678101. The next prime is 243678139. The reversal of 243678136 is 631876342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243678139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67146 + ... + 70681.

Almost surely, 2^243678136 is an apocalyptic number.

243678136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

243678136 is an abundant number, since it is smaller than the sum of its proper divisors (277311704).

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

243678136 is a wasteful number, since it uses less digits than its factorization.

243678136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137863 (or 137859 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 243678136 is about 15610.1933364068. The cubic root of 243678136 is about 624.6050932504.

The spelling of 243678136 in words is "two hundred forty-three million, six hundred seventy-eight thousand, one hundred thirty-six".