1898197028 has 48 divisors (see below), whose sum is σ = 4097729664. Its totient is φ = 749226240.

The previous prime is 1898197019. The next prime is 1898197043. The reversal of 1898197028 is 8207918981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160643 + ... + 172053.

It is an arithmetic number, because the mean of its divisors is an integer number (85369368).

Almost surely, 2^1898197028 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 1898197028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048864832).

1898197028 is an abundant number, since it is smaller than the sum of its proper divisors (2199532636).

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

1898197028 is a wasteful number, since it uses less digits than its factorization.

1898197028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892 (or 11890 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 53.

The square root of 1898197028 is about 43568.3030195118. The cubic root of 1898197028 is about 1238.1704349065.

The spelling of 1898197028 in words is "one billion, eight hundred ninety-eight million, one hundred ninety-seven thousand, twenty-eight".