143661376 has 56 divisors (see below), whose sum is σ = 297829224. Its totient is φ = 68689920.

The previous prime is 143661367. The next prime is 143661377. The reversal of 143661376 is 673166341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36000000 + 107661376 = 6000^2 + 10376^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143661377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138556 + ... + 139588.

It is an arithmetic number, because the mean of its divisors is an integer number (5318379).

Almost surely, 2^143661376 is an apocalyptic number.

143661376 is a gapful number since it is divisible by the number (16) 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 143661376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148914612).

143661376 is an abundant number, since it is smaller than the sum of its proper divisors (154167848).

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

143661376 is a wasteful number, since it uses less digits than its factorization.

143661376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1129 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 143661376 is about 11985.8823621793. The cubic root of 143661376 is about 523.7371017722.

The spelling of 143661376 in words is "one hundred forty-three million, six hundred sixty-one thousand, three hundred seventy-six".