1200550320 has 120 divisors (see below), whose sum is σ = 4207203936. Its totient is φ = 306223104.

The previous prime is 1200550313. The next prime is 1200550357. The reversal of 1200550320 is 230550021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1200550293 and 1200550302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19689 + ... + 52808.

Almost surely, 2^1200550320 is an apocalyptic number.

1200550320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200550320 is an abundant number, since it is smaller than the sum of its proper divisors (3006653616).

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

1200550320 is a wasteful number, since it uses less digits than its factorization.

1200550320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72539 (or 72530 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1200550320 is about 34648.9584259037. The cubic root of 1200550320 is about 1062.8209894298.

The spelling of 1200550320 in words is "one billion, two hundred million, five hundred fifty thousand, three hundred twenty".