1028498194201 has 3 divisors (see below), whose sum is σ = 1028499208351. Its totient is φ = 1028497180052.

The previous prime is 1028498194187. The next prime is 1028498194237. The reversal of 1028498194201 is 1024918948201.

The square root of 1028498194201 is 1014149.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1028092574601 + 405619600 = 1013949^2 + 20140^2 .

It is not a de Polignac number, because 1028498194201 - 2¹¹ = 1028498192153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028498194301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 507075 + ... + 1521223.

Almost surely, 2^{1028498194201} is an apocalyptic number.

1028498194201 is the 1014149-th square number.

1028498194201 is the 507075-th centered octagonal number.

It is an amenable number.

1028498194201 is a deficient number, since it is larger than the sum of its proper divisors (1014150).

1028498194201 is an frugal number, since it uses more digits than its factorization.

1028498194201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028298 (or 1014149 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

Multiplying 1028498194201 by its sum of digits (49), we get a square (50396411515849 = 7099043²).

The spelling of 1028498194201 in words is "one trillion, twenty-eight billion, four hundred ninety-eight million, one hundred ninety-four thousand, two hundred one".