143685820 has 12 divisors (see below), whose sum is σ = 301740264. Its totient is φ = 57474320.

The previous prime is 143685811. The next prime is 143685851. The reversal of 143685820 is 28586341.

It is a happy number.

It is a super-2 number, since 2×143685820² = 41291229738144800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 143685820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3592126 + ... + 3592165.

It is an arithmetic number, because the mean of its divisors is an integer number (25145022).

Almost surely, 2^143685820 is an apocalyptic number.

143685820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143685820 is an abundant number, since it is smaller than the sum of its proper divisors (158054444).

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

143685820 is a wasteful number, since it uses less digits than its factorization.

143685820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184300 (or 7184298 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 143685820 is about 11986.9020184533. The cubic root of 143685820 is about 523.7668047308.

The spelling of 143685820 in words is "one hundred forty-three million, six hundred eighty-five thousand, eight hundred twenty".