143643456 has 210 divisors, whose sum is σ = 470076530. Its totient is φ = 43338240.

The previous prime is 143643449. The next prime is 143643473. The reversal of 143643456 is 654346341.

143643456 is a `hidden beast` number, since 1 + 4 + 3 + 643 + 4 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 141134400 + 2509056 = 11880^2 + 1584^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 143643456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 627150 + ... + 627378.

Almost surely, 2^143643456 is an apocalyptic number.

143643456 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 143643456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235038265).

143643456 is an abundant number, since it is smaller than the sum of its proper divisors (326433074).

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

143643456 is a wasteful number, since it uses less digits than its factorization.

143643456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 245 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 143643456 is about 11985.1347927339. The cubic root of 143643456 is about 523.7153242669.

Adding to 143643456 its reverse (654346341), we get a palindrome (797989797).

The spelling of 143643456 in words is "one hundred forty-three million, six hundred forty-three thousand, four hundred fifty-six".