143981990 has 16 divisors (see below), whose sum is σ = 259308000. Its totient is φ = 57561600.

The previous prime is 143981987. The next prime is 143982049. The reversal of 143981990 is 99189341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27590 + ... + 32390.

It is an arithmetic number, because the mean of its divisors is an integer number (16206750).

Almost surely, 2^143981990 is an apocalyptic number.

143981990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

143981990 is a deficient number, since it is larger than the sum of its proper divisors (115326010).

143981990 is a wasteful number, since it uses less digits than its factorization.

143981990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 143981990 is about 11999.2495598683. The cubic root of 143981990 is about 524.1264262860.

The spelling of 143981990 in words is "one hundred forty-three million, nine hundred eighty-one thousand, nine hundred ninety".