609795440 has 40 divisors (see below), whose sum is σ = 1501176240. Its totient is φ = 229569536.

The previous prime is 609795401. The next prime is 609795449. The reversal of 609795440 is 44597906.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 609795391 and 609795400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609795449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222830 + ... + 225549.

It is an arithmetic number, because the mean of its divisors is an integer number (37529406).

Almost surely, 2^609795440 is an apocalyptic number.

It is an amenable number.

609795440 is an abundant number, since it is smaller than the sum of its proper divisors (891380800).

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

609795440 is a wasteful number, since it uses less digits than its factorization.

609795440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448409 (or 448403 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 609795440 is about 24694.0365270646. The cubic root of 609795440 is about 847.9977972531.

The spelling of 609795440 in words is "six hundred nine million, seven hundred ninety-five thousand, four hundred forty".