143020440 has 144 divisors (see below), whose sum is σ = 486551520. Its totient is φ = 36432000.

The previous prime is 143020433. The next prime is 143020457. The reversal of 143020440 is 44020341.

It is a super-3 number, since 3×143020440³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 190065 + ... + 190815.

It is an arithmetic number, because the mean of its divisors is an integer number (3378830).

Almost surely, 2^143020440 is an apocalyptic number.

143020440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143020440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243275760).

143020440 is an abundant number, since it is smaller than the sum of its proper divisors (343531080).

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

143020440 is a wasteful number, since it uses less digits than its factorization.

143020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 143020440 is about 11959.1153518979. The cubic root of 143020440 is about 522.9570674506.

Adding to 143020440 its reverse (44020341), we get a palindrome (187040781).

Subtracting from 143020440 its reverse (44020341), we obtain a palindrome (99000099).

The spelling of 143020440 in words is "one hundred forty-three million, twenty thousand, four hundred forty".