143688640 has 56 divisors (see below), whose sum is σ = 360182160. Its totient is φ = 54448128.

The previous prime is 143688617. The next prime is 143688647. The reversal of 143688640 is 46886341.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 143688593 and 143688602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143688647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5737 + ... + 17896.

Almost surely, 2^143688640 is an apocalyptic number.

143688640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143688640 is an abundant number, since it is smaller than the sum of its proper divisors (216493520).

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

143688640 is a wasteful number, since it uses less digits than its factorization.

143688640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23669 (or 23659 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 143688640 is about 11987.0196462674. The cubic root of 143688640 is about 523.7702312176.

The spelling of 143688640 in words is "one hundred forty-three million, six hundred eighty-eight thousand, six hundred forty".