1213808200 has 48 divisors (see below), whose sum is σ = 3078664560. Its totient is φ = 441384000.

The previous prime is 1213808159. The next prime is 1213808207. The reversal of 1213808200 is 28083121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1213808207) 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, 273666 + ... + 278065.

It is an arithmetic number, because the mean of its divisors is an integer number (64138845).

Almost surely, 2^1213808200 is an apocalyptic number.

1213808200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213808200 is an abundant number, since it is smaller than the sum of its proper divisors (1864856360).

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

1213808200 is a wasteful number, since it uses less digits than its factorization.

1213808200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551758 (or 551749 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1213808200 is about 34839.7502861315. The cubic root of 1213808200 is about 1066.7189796392.

The spelling of 1213808200 in words is "one billion, two hundred thirteen million, eight hundred eight thousand, two hundred".