609042240 has 140 divisors (see below), whose sum is σ = 2166562596. Its totient is φ = 162404352.

The previous prime is 609042223. The next prime is 609042251. The reversal of 609042240 is 42240906.

It can be written as a sum of positive squares in 2 ways, for example, as 355850496 + 253191744 = 18864^2 + 15912^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14172 + ... + 37668.

Almost surely, 2^609042240 is an apocalyptic number.

609042240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609042240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083281298).

609042240 is an abundant number, since it is smaller than the sum of its proper divisors (1557520356).

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

609042240 is a wasteful number, since it uses less digits than its factorization.

609042240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23526 (or 23507 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 609042240 is about 24678.7811692555. The cubic root of 609042240 is about 847.6485134049.

The spelling of 609042240 in words is "six hundred nine million, forty-two thousand, two hundred forty".