1220488560 has 400 divisors, whose sum is σ = 4666844160. Its totient is φ = 294243840.

The previous prime is 1220488553. The next prime is 1220488561. The reversal of 1220488560 is 658840221.

1220488560 is a `hidden beast` number, since 12 + 2 + 0 + 4 + 88 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220488561) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2831545 + ... + 2831975.

Almost surely, 2^1220488560 is an apocalyptic number.

1220488560 is a gapful number since it is divisible by the number (10) 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 1220488560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333422080).

1220488560 is an abundant number, since it is smaller than the sum of its proper divisors (3446355600).

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

1220488560 is a wasteful number, since it uses less digits than its factorization.

1220488560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1220488560 is about 34935.4914091673. The cubic root of 1220488560 is about 1068.6723452350.

The spelling of 1220488560 in words is "one billion, two hundred twenty million, four hundred eighty-eight thousand, five hundred sixty".