144991386 has 24 divisors (see below), whose sum is σ = 318127680. Its totient is φ = 47718216.

The previous prime is 144991373. The next prime is 144991439. The reversal of 144991386 is 683199441.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 49560 + ... + 52403.

It is an arithmetic number, because the mean of its divisors is an integer number (13255320).

Almost surely, 2^144991386 is an apocalyptic number.

144991386 is an abundant number, since it is smaller than the sum of its proper divisors (173136294).

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

144991386 is a wasteful number, since it uses less digits than its factorization.

144991386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102050 (or 102047 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 144991386 is about 12041.2368965983. The cubic root of 144991386 is about 525.3483837316.

The spelling of 144991386 in words is "one hundred forty-four million, nine hundred ninety-one thousand, three hundred eighty-six".