655236400 has 240 divisors, whose sum is σ = 1983873024. Its totient is φ = 202429440.

The previous prime is 655236377. The next prime is 655236437. The reversal of 655236400 is 4632556.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1710609 + ... + 1710991.

Almost surely, 2^655236400 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 655236400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991936512).

655236400 is an abundant number, since it is smaller than the sum of its proper divisors (1328636624).

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

655236400 is a wasteful number, since it uses less digits than its factorization.

655236400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 655236400 is about 25597.5858236670. The cubic root of 655236400 is about 868.5590274290.

Adding to 655236400 its reverse (4632556), we get a palindrome (659868956).

The spelling of 655236400 in words is "six hundred fifty-five million, two hundred thirty-six thousand, four hundred".