1220144200 has 48 divisors (see below), whose sum is σ = 3094734960. Its totient is φ = 443688000.

The previous prime is 1220144137. The next prime is 1220144201. The reversal of 1220144200 is 24410221.

1220144200 = 2545² + 2546² + ... + 2720².

It is not an unprimeable number, because it can be changed into a prime (1220144201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275106 + ... + 279505.

It is an arithmetic number, because the mean of its divisors is an integer number (64473645).

Almost surely, 2^1220144200 is an apocalyptic number.

1220144200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220144200 is an abundant number, since it is smaller than the sum of its proper divisors (1874590760).

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

1220144200 is a wasteful number, since it uses less digits than its factorization.

1220144200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554638 (or 554629 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1220144200 is about 34930.5625491488. The cubic root of 1220144200 is about 1068.5718273939.

Adding to 1220144200 its reverse (24410221), we get a palindrome (1244554421).

The spelling of 1220144200 in words is "one billion, two hundred twenty million, one hundred forty-four thousand, two hundred".