143861380 has 48 divisors (see below), whose sum is σ = 329056560. Its totient is φ = 52512768.

The previous prime is 143861357. The next prime is 143861383. The reversal of 143861380 is 83168341.

It can be written as a sum of positive squares in 8 ways, for example, as 13307904 + 130553476 = 3648^2 + 11426^2 .

It is not an unprimeable number, because it can be changed into a prime (143861383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20032 + ... + 26248.

It is an arithmetic number, because the mean of its divisors is an integer number (6855345).

Almost surely, 2^143861380 is an apocalyptic number.

143861380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143861380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164528280).

143861380 is an abundant number, since it is smaller than the sum of its proper divisors (185195180).

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

143861380 is a wasteful number, since it uses less digits than its factorization.

143861380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6328 (or 6326 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 143861380 is about 11994.2227759868. Note that the first 3 decimals coincide. The cubic root of 143861380 is about 523.9800363390.

The spelling of 143861380 in words is "one hundred forty-three million, eight hundred sixty-one thousand, three hundred eighty".