1201663320 has 256 divisors, whose sum is σ = 4267468800. Its totient is φ = 266864640.

The previous prime is 1201663297. The next prime is 1201663327. The reversal of 1201663320 is 233661021.

It is a happy number.

1201663320 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201663327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4101094 + ... + 4101386.

It is an arithmetic number, because the mean of its divisors is an integer number (16669800).

Almost surely, 2^1201663320 is an apocalyptic number.

1201663320 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 1201663320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2133734400).

1201663320 is an abundant number, since it is smaller than the sum of its proper divisors (3065805480).

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

1201663320 is a wasteful number, since it uses less digits than its factorization.

1201663320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1201663320 is about 34665.0157940250. The cubic root of 1201663320 is about 1063.1493261872.

The spelling of 1201663320 in words is "one billion, two hundred one million, six hundred sixty-three thousand, three hundred twenty".