609140736 has 240 divisors, whose sum is σ = 1934563680. Its totient is φ = 191102976.

The previous prime is 609140729. The next prime is 609140747. The reversal of 609140736 is 637041906.

609140736 is a `hidden beast` number, since 609 + 1 + 40 + 7 + 3 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 609140736.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35831800 + ... + 35831816.

It is an arithmetic number, because the mean of its divisors is an integer number (8060682).

Almost surely, 2^609140736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609140736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967281840).

609140736 is an abundant number, since it is smaller than the sum of its proper divisors (1325422944).

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

609140736 is an frugal number, since it uses more digits than its factorization.

609140736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 22 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 609140736 is about 24680.7766490441. The cubic root of 609140736 is about 847.6942056312.

The spelling of 609140736 in words is "six hundred nine million, one hundred forty thousand, seven hundred thirty-six".