143680640 has 32 divisors (see below), whose sum is σ = 343488060. Its totient is φ = 57472000.

The previous prime is 143680637. The next prime is 143680643. The reversal of 143680640 is 46086341.

It is an interprime number because it is at equal distance from previous prime (143680637) and next prime (143680643).

It can be written as a sum of positive squares in 2 ways, for example, as 141895744 + 1784896 = 11912^2 + 1336^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 143680597 and 143680606.

It is not an unprimeable number, because it can be changed into a prime (143680643) 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 3 ways as a sum of consecutive naturals, for example, 111611 + ... + 112890.

Almost surely, 2^143680640 is an apocalyptic number.

143680640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143680640 is an abundant number, since it is smaller than the sum of its proper divisors (199807420).

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

143680640 is an equidigital number, since it uses as much as digits as its factorization.

143680640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224520 (or 224508 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 143680640 is about 11986.6859473334. The cubic root of 143680640 is about 523.7605105707.

The spelling of 143680640 in words is "one hundred forty-three million, six hundred eighty thousand, six hundred forty".