143897920 has 28 divisors (see below), whose sum is σ = 342657684. Its totient is φ = 57559040.

The previous prime is 143897903. The next prime is 143897927. The reversal of 143897920 is 29798341.

143897920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59845696 + 84052224 = 7736^2 + 9168^2 .

It is a super-2 number, since 2×143897920² = 41413222760652800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143897927) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 224521 + ... + 225160.

Almost surely, 2^143897920 is an apocalyptic number.

143897920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143897920 is an abundant number, since it is smaller than the sum of its proper divisors (198759764).

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

143897920 is an equidigital number, since it uses as much as digits as its factorization.

143897920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449698 (or 449688 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 143897920 is about 11995.7459126142. The cubic root of 143897920 is about 524.0243952669.

The spelling of 143897920 in words is "one hundred forty-three million, eight hundred ninety-seven thousand, nine hundred twenty".