609089540 has 12 divisors (see below), whose sum is σ = 1279088076. Its totient is φ = 243635808.

The previous prime is 609089531. The next prime is 609089543. The reversal of 609089540 is 45980906.

It can be written as a sum of positive squares in 2 ways, for example, as 96157636 + 512931904 = 9806^2 + 22648^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (609089543) 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, 15227219 + ... + 15227258.

It is an arithmetic number, because the mean of its divisors is an integer number (106590673).

Almost surely, 2^609089540 is an apocalyptic number.

It is an amenable number.

609089540 is an abundant number, since it is smaller than the sum of its proper divisors (669998536).

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

609089540 is a wasteful number, since it uses less digits than its factorization.

609089540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30454486 (or 30454484 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 609089540 is about 24679.7394637788. The cubic root of 609089540 is about 847.6704564570.

The spelling of 609089540 in words is "six hundred nine million, eighty-nine thousand, five hundred forty".