143705664 has 140 divisors (see below), whose sum is σ = 448716400. Its totient is φ = 45349632.

The previous prime is 143705647. The next prime is 143705689. The reversal of 143705664 is 466507341.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97767 + ... + 99225.

Almost surely, 2^143705664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143705664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224358200).

143705664 is an abundant number, since it is smaller than the sum of its proper divisors (305010736).

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

143705664 is a wasteful number, since it uses less digits than its factorization.

143705664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 143705664 is about 11987.7297266830. The cubic root of 143705664 is about 523.7909155536.

The spelling of 143705664 in words is "one hundred forty-three million, seven hundred five thousand, six hundred sixty-four".