1203123320 has 256 divisors, whose sum is σ = 3527193600. Its totient is φ = 359424000.

The previous prime is 1203123289. The next prime is 1203123331. The reversal of 1203123320 is 233213021.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4793195 + ... + 4793445.

It is an arithmetic number, because the mean of its divisors is an integer number (13778100).

Almost surely, 2^1203123320 is an apocalyptic number.

1203123320 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 1203123320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1763596800).

1203123320 is an abundant number, since it is smaller than the sum of its proper divisors (2324070280).

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

1203123320 is a wasteful number, since it uses less digits than its factorization.

1203123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1203123320 is about 34686.0680965716. The cubic root of 1203123320 is about 1063.5797212303.

Adding to 1203123320 its reverse (233213021), we get a palindrome (1436336341).

The spelling of 1203123320 in words is "one billion, two hundred three million, one hundred twenty-three thousand, three hundred twenty".