655012240 has 40 divisors (see below), whose sum is σ = 1532276928. Its totient is φ = 260392320.

The previous prime is 655012229. The next prime is 655012271. The reversal of 655012240 is 42210556.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12076 + ... + 38155.

Almost surely, 2^655012240 is an apocalyptic number.

It is an amenable number.

655012240 is an abundant number, since it is smaller than the sum of its proper divisors (877264688).

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

655012240 is a wasteful number, since it uses less digits than its factorization.

655012240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50407 (or 50401 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 655012240 is about 25593.2069112099. The cubic root of 655012240 is about 868.4599698481.

Adding to 655012240 its reverse (42210556), we get a palindrome (697222796).

The spelling of 655012240 in words is "six hundred fifty-five million, twelve thousand, two hundred forty".