1223199648 has 144 divisors (see below), whose sum is σ = 3827259072. Its totient is φ = 370550400.

The previous prime is 1223199647. The next prime is 1223199673. The reversal of 1223199648 is 8469913221.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1223199641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381733 + ... + 384923.

It is an arithmetic number, because the mean of its divisors is an integer number (26578188).

Almost surely, 2^1223199648 is an apocalyptic number.

1223199648 is a gapful number since it is divisible by the number (18) 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 1223199648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1913629536).

1223199648 is an abundant number, since it is smaller than the sum of its proper divisors (2604059424).

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

1223199648 is a wasteful number, since it uses less digits than its factorization.

1223199648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240 (or 3207 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1223199648 is about 34974.2712290049. The cubic root of 1223199648 is about 1069.4630455782.

The spelling of 1223199648 in words is "one billion, two hundred twenty-three million, one hundred ninety-nine thousand, six hundred forty-eight".