1223799500 has 288 divisors, whose sum is σ = 3585254400. Its totient is φ = 359856000.

The previous prime is 1223799497. The next prime is 1223799539. The reversal of 1223799500 is 59973221.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5120381 + ... + 5120619.

It is an arithmetic number, because the mean of its divisors is an integer number (12448800).

Almost surely, 2^1223799500 is an apocalyptic number.

1223799500 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 1223799500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792627200).

1223799500 is an abundant number, since it is smaller than the sum of its proper divisors (2361454900).

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

1223799500 is a wasteful number, since it uses less digits than its factorization.

1223799500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 1223799500 is about 34982.8457961899. The cubic root of 1223799500 is about 1069.6378370797.

The spelling of 1223799500 in words is "one billion, two hundred twenty-three million, seven hundred ninety-nine thousand, five hundred".