1220136600 has 192 divisors, whose sum is σ = 3889706400. Its totient is φ = 316293120.

The previous prime is 1220136587. The next prime is 1220136613. The reversal of 1220136600 is 66310221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220136587) and next prime (1220136613).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3898044 + ... + 3898356.

Almost surely, 2^1220136600 is an apocalyptic number.

1220136600 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 1220136600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944853200).

1220136600 is an abundant number, since it is smaller than the sum of its proper divisors (2669569800).

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

1220136600 is a wasteful number, since it uses less digits than its factorization.

1220136600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1220136600 is about 34930.4537617249. The cubic root of 1220136600 is about 1068.5696087592.

Adding to 1220136600 its reverse (66310221), we get a palindrome (1286446821).

The spelling of 1220136600 in words is "one billion, two hundred twenty million, one hundred thirty-six thousand, six hundred".