144990 has 40 divisors (see below), whose sum is σ = 392040. Its totient is φ = 38448.

The previous prime is 144983. The next prime is 145007. The reversal of 144990 is 99441.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 721 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (9801).

2¹⁴⁴⁹⁹⁰ is an apocalyptic number.

144990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 144990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196020).

144990 is an abundant number, since it is smaller than the sum of its proper divisors (247050).

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

144990 is a wasteful number, since it uses less digits than its factorization.

144990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 144990 is about 380.7755244235. The cubic root of 144990 is about 52.5346709758.

The spelling of 144990 in words is "one hundred forty-four thousand, nine hundred ninety".