655857888 has 96 divisors (see below), whose sum is σ = 1971889920. Its totient is φ = 186977280.

The previous prime is 655857883. The next prime is 655857899. The reversal of 655857888 is 888758556.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655857883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442108 + ... + 443588.

It is an arithmetic number, because the mean of its divisors is an integer number (20540520).

Almost surely, 2^655857888 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 655857888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985944960).

655857888 is an abundant number, since it is smaller than the sum of its proper divisors (1316032032).

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

655857888 is a wasteful number, since it uses less digits than its factorization.

655857888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160 (or 2152 counting only the distinct ones).

The product of its digits is 21504000, while the sum is 60.

The square root of 655857888 is about 25609.7225287585. The cubic root of 655857888 is about 868.8335484198.

It can be divided in two parts, 6558 and 57888, that added together give a palindrome (64446).

The spelling of 655857888 in words is "six hundred fifty-five million, eight hundred fifty-seven thousand, eight hundred eighty-eight".