1220489600 has 96 divisors (see below), whose sum is σ = 3289175640. Its totient is φ = 443801600.

The previous prime is 1220489593. The next prime is 1220489603. The reversal of 1220489600 is 69840221.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220489603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17864 + ... + 52536.

Almost surely, 2^1220489600 is an apocalyptic number.

1220489600 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 1220489600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644587820).

1220489600 is an abundant number, since it is smaller than the sum of its proper divisors (2068686040).

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

1220489600 is a wasteful number, since it uses less digits than its factorization.

1220489600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34708 (or 34691 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1220489600 is about 34935.5062937408. The cubic root of 1220489600 is about 1068.6726487798.

The spelling of 1220489600 in words is "one billion, two hundred twenty million, four hundred eighty-nine thousand, six hundred".