606742640 has 80 divisors (see below), whose sum is σ = 1667839680. Its totient is φ = 200847360.

The previous prime is 606742621. The next prime is 606742657. The reversal of 606742640 is 46247606.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 606742640.

It is a congruent number.

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, 2441 + ... + 34920.

It is an arithmetic number, because the mean of its divisors is an integer number (20847996).

Almost surely, 2^606742640 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 606742640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833919840).

606742640 is an abundant number, since it is smaller than the sum of its proper divisors (1061097040).

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

606742640 is a wasteful number, since it uses less digits than its factorization.

606742640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37410 (or 37404 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 606742640 is about 24632.1464756931. The cubic root of 606742640 is about 846.5803275121.

The spelling of 606742640 in words is "six hundred six million, seven hundred forty-two thousand, six hundred forty".