655044420 has 24 divisors (see below), whose sum is σ = 1834124544. Its totient is φ = 174678496.

The previous prime is 655044419. The next prime is 655044421. The reversal of 655044420 is 24440556.

It is an interprime number because it is at equal distance from previous prime (655044419) and next prime (655044421).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (655044421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5458644 + ... + 5458763.

It is an arithmetic number, because the mean of its divisors is an integer number (76421856).

Almost surely, 2^655044420 is an apocalyptic number.

655044420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655044420 is an abundant number, since it is smaller than the sum of its proper divisors (1179080124).

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

655044420 is a wasteful number, since it uses less digits than its factorization.

655044420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10917419 (or 10917417 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 655044420 is about 25593.8355859375. The cubic root of 655044420 is about 868.4741917626.

Adding to 655044420 its reverse (24440556), we get a palindrome (679484976).

The spelling of 655044420 in words is "six hundred fifty-five million, forty-four thousand, four hundred twenty".