655441380 has 72 divisors (see below), whose sum is σ = 2168921664. Its totient is φ = 158894400.

The previous prime is 655441357. The next prime is 655441393. The reversal of 655441380 is 83144556.

It is a happy number.

655441380 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163536 + ... + 167495.

It is an arithmetic number, because the mean of its divisors is an integer number (30123912).

Almost surely, 2^655441380 is an apocalyptic number.

655441380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655441380 is an abundant number, since it is smaller than the sum of its proper divisors (1513480284).

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

655441380 is a wasteful number, since it uses less digits than its factorization.

655441380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331057 (or 331052 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 655441380 is about 25601.5894037851. The cubic root of 655441380 is about 868.6495894853.

It can be divided in two parts, 65 and 5441380, that added together give a palindrome (5441445).

The spelling of 655441380 in words is "six hundred fifty-five million, four hundred forty-one thousand, three hundred eighty".