609281144 has 16 divisors (see below), whose sum is σ = 1144654200. Its totient is φ = 304040032.

The previous prime is 609281143. The next prime is 609281149. The reversal of 609281144 is 441182906.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609281143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70742 + ... + 78885.

Almost surely, 2^609281144 is an apocalyptic number.

It is an amenable number.

609281144 is a deficient number, since it is larger than the sum of its proper divisors (535373056).

609281144 is a wasteful number, since it uses less digits than its factorization.

609281144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150142 (or 150138 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 609281144 is about 24683.6209661387. The cubic root of 609281144 is about 847.7593322909.

The spelling of 609281144 in words is "six hundred nine million, two hundred eighty-one thousand, one hundred forty-four".