655015340 has 72 divisors (see below), whose sum is σ = 1630428912. Its totient is φ = 220321920.

The previous prime is 655015331. The next prime is 655015343. The reversal of 655015340 is 43510556.

It is not an unprimeable number, because it can be changed into a prime (655015343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45635 + ... + 58245.

It is an arithmetic number, because the mean of its divisors is an integer number (22644846).

Almost surely, 2^655015340 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 655015340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815214456).

655015340 is an abundant number, since it is smaller than the sum of its proper divisors (975413572).

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

655015340 is a wasteful number, since it uses less digits than its factorization.

655015340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12687 (or 12678 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 655015340 is about 25593.2674740839. The cubic root of 655015340 is about 868.4613399099.

Adding to 655015340 its reverse (43510556), we get a palindrome (698525896).

The spelling of 655015340 in words is "six hundred fifty-five million, fifteen thousand, three hundred forty".