655226880 has 384 divisors, whose sum is σ = 2622896640. Its totient is φ = 135659520.

The previous prime is 655226867. The next prime is 655226893. The reversal of 655226880 is 88622556.

It is an interprime number because it is at equal distance from previous prime (655226867) and next prime (655226893).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2365302 + ... + 2365578.

It is an arithmetic number, because the mean of its divisors is an integer number (6830460).

Almost surely, 2^655226880 is an apocalyptic number.

655226880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655226880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1311448320).

655226880 is an abundant number, since it is smaller than the sum of its proper divisors (1967669760).

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

655226880 is a wasteful number, since it uses less digits than its factorization.

655226880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 655226880 is about 25597.3998679553. The cubic root of 655226880 is about 868.5548209461.

The spelling of 655226880 in words is "six hundred fifty-five million, two hundred twenty-six thousand, eight hundred eighty".