1203553728 has 168 divisors, whose sum is σ = 3853381168. Its totient is φ = 370262016.

The previous prime is 1203553717. The next prime is 1203553783. The reversal of 1203553728 is 8273553021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1203553692 and 1203553701.

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, 199200 + ... + 205152.

Almost surely, 2^1203553728 is an apocalyptic number.

1203553728 is a gapful number since it is divisible by the number (18) 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 1203553728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926690584).

1203553728 is an abundant number, since it is smaller than the sum of its proper divisors (2649827440).

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

1203553728 is an equidigital number, since it uses as much as digits as its factorization.

1203553728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993 (or 5971 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1203553728 is about 34692.2718771775. The cubic root of 1203553728 is about 1063.7065352306.

It can be divided in two parts, 1203 and 553728, that added together give a triangular number (554931 = T₁₀₅₃).

The spelling of 1203553728 in words is "one billion, two hundred three million, five hundred fifty-three thousand, seven hundred twenty-eight".