143981892 has 18 divisors (see below), whose sum is σ = 363954318. Its totient is φ = 47993952.

The previous prime is 143981881. The next prime is 143981917. The reversal of 143981892 is 298189341.

It can be written as a sum of positive squares in only one way, i.e., 131194116 + 12787776 = 11454^2 + 3576^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1999713 + ... + 1999784.

Almost surely, 2^143981892 is an apocalyptic number.

143981892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

143981892 is an abundant number, since it is smaller than the sum of its proper divisors (219972426).

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

143981892 is a wasteful number, since it uses less digits than its factorization.

143981892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999507 (or 3999502 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 143981892 is about 11999.2454762789. The cubic root of 143981892 is about 524.1263073721.

It can be divided in two parts, 14398 and 1892, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 143981892 in words is "one hundred forty-three million, nine hundred eighty-one thousand, eight hundred ninety-two".