1200203604 has 72 divisors (see below), whose sum is σ = 3244281768. Its totient is φ = 372787200.

The previous prime is 1200203597. The next prime is 1200203633. The reversal of 1200203604 is 4063020021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 242424900 + 957778704 = 15570^2 + 30948^2 .

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

It is a congruent number.

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, 52104 + ... + 71520.

It is an arithmetic number, because the mean of its divisors is an integer number (45059469).

Almost surely, 2^1200203604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200203604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622140884).

1200203604 is an abundant number, since it is smaller than the sum of its proper divisors (2044078164).

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

1200203604 is a wasteful number, since it uses less digits than its factorization.

1200203604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19545 (or 19540 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1200203604 is about 34643.9547973380. The cubic root of 1200203604 is about 1062.7186662103.

Adding to 1200203604 its reverse (4063020021), we get a palindrome (5263223625).

The spelling of 1200203604 in words is "one billion, two hundred million, two hundred three thousand, six hundred four".