144031986 has 32 divisors (see below), whose sum is σ = 365796480. Its totient is φ = 41151888.

The previous prime is 144031981. The next prime is 144032023. The reversal of 144031986 is 689130441.

It is a super-2 number, since 2×144031986² = 41490425982208392, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 144031986.

It is not an unprimeable number, because it can be changed into a prime (144031981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190141 + ... + 190896.

It is an arithmetic number, because the mean of its divisors is an integer number (11431140).

Almost surely, 2^144031986 is an apocalyptic number.

144031986 is an abundant number, since it is smaller than the sum of its proper divisors (221764494).

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

144031986 is a wasteful number, since it uses less digits than its factorization.

144031986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381055 (or 381049 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 144031986 is about 12001.3326759989. The cubic root of 144031986 is about 524.1870847808.

The spelling of 144031986 in words is "one hundred forty-four million, thirty-one thousand, nine hundred eighty-six".