143361918 has 144 divisors (see below), whose sum is σ = 392331264. Its totient is φ = 37013760.

The previous prime is 143361899. The next prime is 143361919. The reversal of 143361918 is 819163341.

143361918 is a `hidden beast` number, since 1 + 4 + 33 + 619 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143361919) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1128771 + ... + 1128897.

Almost surely, 2^143361918 is an apocalyptic number.

143361918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 143361918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196165632).

143361918 is an abundant number, since it is smaller than the sum of its proper divisors (248969346).

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

143361918 is a wasteful number, since it uses less digits than its factorization.

143361918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 187 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 143361918 is about 11973.3837322622. The cubic root of 143361918 is about 523.3729436619.

The spelling of 143361918 in words is "one hundred forty-three million, three hundred sixty-one thousand, nine hundred eighteen".