144789930 has 40 divisors (see below), whose sum is σ = 389326212. Its totient is φ = 38610432.

The previous prime is 144789929. The next prime is 144789943. The reversal of 144789930 is 39987441.

It can be written as a sum of positive squares in 2 ways, for example, as 126360081 + 18429849 = 11241^2 + 4293^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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 19 ways as a sum of consecutive naturals, for example, 88567 + ... + 90186.

Almost surely, 2^144789930 is an apocalyptic number.

144789930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144789930 is an abundant number, since it is smaller than the sum of its proper divisors (244536282).

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

144789930 is a wasteful number, since it uses less digits than its factorization.

144789930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178772 (or 178763 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 144789930 is about 12032.8687352601. The cubic root of 144789930 is about 525.1049586070.

The spelling of 144789930 in words is "one hundred forty-four million, seven hundred eighty-nine thousand, nine hundred thirty".