609804540 has 36 divisors (see below), whose sum is σ = 1849740984. Its totient is φ = 162614496.

The previous prime is 609804527. The next prime is 609804541. The reversal of 609804540 is 45408906.

609804540 is a `hidden beast` number, since 609 + 8 + 0 + 4 + 5 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×609804540² = 743723154009223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 609804495 and 609804504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609804541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1693722 + ... + 1694081.

It is an arithmetic number, because the mean of its divisors is an integer number (51381694).

Almost surely, 2^609804540 is an apocalyptic number.

609804540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

609804540 is an abundant number, since it is smaller than the sum of its proper divisors (1239936444).

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

609804540 is a wasteful number, since it uses less digits than its factorization.

609804540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387818 (or 3387813 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 609804540 is about 24694.2207813893. The cubic root of 609804540 is about 848.0020154663.

The spelling of 609804540 in words is "six hundred nine million, eight hundred four thousand, five hundred forty".