1229138200 has 48 divisors (see below), whose sum is σ = 2860207560. Its totient is φ = 491232000.

The previous prime is 1229138191. The next prime is 1229138201. The reversal of 1229138200 is 28319221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229138201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342415 + ... + 345985.

Almost surely, 2^1229138200 is an apocalyptic number.

1229138200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229138200 is an abundant number, since it is smaller than the sum of its proper divisors (1631069360).

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

1229138200 is a wasteful number, since it uses less digits than its factorization.

1229138200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1229138200 is about 35059.0673007711. The cubic root of 1229138200 is about 1071.1909759718.

The spelling of 1229138200 in words is "one billion, two hundred twenty-nine million, one hundred thirty-eight thousand, two hundred".