1220454200 has 96 divisors (see below), whose sum is σ = 3251280000. Its totient is φ = 417363840.

The previous prime is 1220454181. The next prime is 1220454211. The reversal of 1220454200 is 24540221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 697727 + ... + 699473.

It is an arithmetic number, because the mean of its divisors is an integer number (33867500).

Almost surely, 2^1220454200 is an apocalyptic number.

1220454200 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 1220454200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625640000).

1220454200 is an abundant number, since it is smaller than the sum of its proper divisors (2030825800).

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

1220454200 is a wasteful number, since it uses less digits than its factorization.

1220454200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1220454200 is about 34934.9996421926. Note that the first 3 decimals coincide. The cubic root of 1220454200 is about 1068.6623164843.

Adding to 1220454200 its reverse (24540221), we get a palindrome (1244994421).

The spelling of 1220454200 in words is "one billion, two hundred twenty million, four hundred fifty-four thousand, two hundred".