144990386 has 4 divisors (see below), whose sum is σ = 217485582. Its totient is φ = 72495192.

The previous prime is 144990371. The next prime is 144990389. The reversal of 144990386 is 683099441.

144990386 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 2307361 = 11945^2 + 1519^2 .

It is not an unprimeable number, because it can be changed into a prime (144990389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36247595 + ... + 36247598.

Almost surely, 2^144990386 is an apocalyptic number.

144990386 is a deficient number, since it is larger than the sum of its proper divisors (72495196).

144990386 is an equidigital number, since it uses as much as digits as its factorization.

144990386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72495195.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 144990386 is about 12041.1953725533. The cubic root of 144990386 is about 525.3471759596.

The spelling of 144990386 in words is "one hundred forty-four million, nine hundred ninety thousand, three hundred eighty-six".