655549400 has 96 divisors (see below), whose sum is σ = 1750334400. Its totient is φ = 225820800.

The previous prime is 655549361. The next prime is 655549409. The reversal of 655549400 is 4945556.

655549400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655549409) 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, 33959 + ... + 49641.

It is an arithmetic number, because the mean of its divisors is an integer number (18232650).

Almost surely, 2^655549400 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 655549400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875167200).

655549400 is an abundant number, since it is smaller than the sum of its proper divisors (1094785000).

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

655549400 is a wasteful number, since it uses less digits than its factorization.

655549400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15729 (or 15720 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 655549400 is about 25603.6989515187. The cubic root of 655549400 is about 868.6973061219.

It can be divided in two parts, 6555 and 49400, that added together give a palindrome (55955).

The spelling of 655549400 in words is "six hundred fifty-five million, five hundred forty-nine thousand, four hundred".