143640864 has 120 divisors (see below), whose sum is σ = 426400128. Its totient is φ = 47433600.

The previous prime is 143640863. The next prime is 143640899. The reversal of 143640864 is 468046341.

143640864 is a `hidden beast` number, since 1 + 4 + 3 + 640 + 8 + 6 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (143640863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 391209 + ... + 391575.

Almost surely, 2^143640864 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 143640864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213200064).

143640864 is an abundant number, since it is smaller than the sum of its proper divisors (282759264).

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

143640864 is a wasteful number, since it uses less digits than its factorization.

143640864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 143640864 is about 11985.0266582933. The cubic root of 143640864 is about 523.7121741564.

The spelling of 143640864 in words is "one hundred forty-three million, six hundred forty thousand, eight hundred sixty-four".