1990372898208 has 96 divisors (see below), whose sum is σ = 5453259348096. Its totient is φ = 634452369408.

The previous prime is 1990372898203. The next prime is 1990372898233. The reversal of 1990372898208 is 8028982730991.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1990372898208² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990372898203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8846760 + ... + 9068952.

It is an arithmetic number, because the mean of its divisors is an integer number (56804784876).

Almost surely, 2^{1990372898208} 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 1990372898208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2726629674048).

1990372898208 is an abundant number, since it is smaller than the sum of its proper divisors (3462886449888).

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

1990372898208 is a wasteful number, since it uses less digits than its factorization.

1990372898208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226286 (or 226278 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 66.

The spelling of 1990372898208 in words is "one trillion, nine hundred ninety billion, three hundred seventy-two million, eight hundred ninety-eight thousand, two hundred eight".