143287920 has 80 divisors (see below), whose sum is σ = 493554720. Its totient is φ = 38209536.

The previous prime is 143287919. The next prime is 143287933. The reversal of 143287920 is 29782341.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31009 + ... + 35328.

It is an arithmetic number, because the mean of its divisors is an integer number (6169434).

Almost surely, 2^143287920 is an apocalyptic number.

143287920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143287920 is an abundant number, since it is smaller than the sum of its proper divisors (350266800).

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

143287920 is a wasteful number, since it uses less digits than its factorization.

143287920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66359 (or 66347 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 143287920 is about 11970.2932294911. The cubic root of 143287920 is about 523.2828797245.

The spelling of 143287920 in words is "one hundred forty-three million, two hundred eighty-seven thousand, nine hundred twenty".