1200000320 has 28 divisors (see below), whose sum is σ = 2857501524. Its totient is φ = 480000000.

The previous prime is 1200000313. The next prime is 1200000337. The reversal of 1200000320 is 230000021.

It can be written as a sum of positive squares in 2 ways, for example, as 921243904 + 278756416 = 30352^2 + 16696^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 1200000298 and 1200000307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874681 + ... + 1875320.

Almost surely, 2^1200000320 is an apocalyptic number.

1200000320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200000320 is an abundant number, since it is smaller than the sum of its proper divisors (1657501204).

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

1200000320 is an equidigital number, since it uses as much as digits as its factorization.

1200000320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750018 (or 3750008 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1200000320 is about 34641.0207701794. The cubic root of 1200000320 is about 1062.6586636411.

Adding to 1200000320 its reverse (230000021), we get a palindrome (1430000341).

The spelling of 1200000320 in words is "one billion, two hundred million, three hundred twenty", and thus it is an aban number.