1200232320 has 128 divisors (see below), whose sum is σ = 4372323840. Its totient is φ = 274335744.

The previous prime is 1200232303. The next prime is 1200232321. The reversal of 1200232320 is 232320021.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1200232320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200232321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31212 + ... + 58091.

It is an arithmetic number, because the mean of its divisors is an integer number (34158780).

Almost surely, 2^1200232320 is an apocalyptic number.

1200232320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200232320 is an abundant number, since it is smaller than the sum of its proper divisors (3172091520).

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

1200232320 is an equidigital number, since it uses as much as digits as its factorization.

1200232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89332 (or 89320 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1200232320 is about 34644.3692394594. The cubic root of 1200232320 is about 1062.7271416573.

Adding to 1200232320 its reverse (232320021), we get a palindrome (1432552341).

The spelling of 1200232320 in words is "one billion, two hundred million, two hundred thirty-two thousand, three hundred twenty".