1202021028 has 72 divisors (see below), whose sum is σ = 3279459456. Its totient is φ = 369028800.

The previous prime is 1202021027. The next prime is 1202021047. The reversal of 1202021028 is 8201202021.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1202021028.

It is not an unprimeable number, because it can be changed into a prime (1202021027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227173 + ... + 232403.

It is an arithmetic number, because the mean of its divisors is an integer number (45548048).

Almost surely, 2^1202021028 is an apocalyptic number.

1202021028 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 1202021028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639729728).

1202021028 is an abundant number, since it is smaller than the sum of its proper divisors (2077438428).

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

1202021028 is a wasteful number, since it uses less digits than its factorization.

1202021028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745 (or 5740 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1202021028 is about 34670.1749058178. The cubic root of 1202021028 is about 1063.2548075601.

Adding to 1202021028 its reverse (8201202021), we get a palindrome (9403223049).

The spelling of 1202021028 in words is "one billion, two hundred two million, twenty-one thousand, twenty-eight".