655390900 has 18 divisors (see below), whose sum is σ = 1422198470. Its totient is φ = 262156320.

The previous prime is 655390891. The next prime is 655390909. The reversal of 655390900 is 9093556.

It is an interprime number because it is at equal distance from previous prime (655390891) and next prime (655390909).

It can be written as a sum of positive squares in 3 ways, for example, as 190384804 + 465006096 = 13798^2 + 21564^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 655390900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655390909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3276855 + ... + 3277054.

Almost surely, 2^655390900 is an apocalyptic number.

It is an amenable number.

655390900 is an abundant number, since it is smaller than the sum of its proper divisors (766807570).

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

655390900 is a wasteful number, since it uses less digits than its factorization.

655390900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6553923 (or 6553916 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 655390900 is about 25600.6035085113. The cubic root of 655390900 is about 868.6272887079.

The spelling of 655390900 in words is "six hundred fifty-five million, three hundred ninety thousand, nine hundred".