1031890000 has 100 divisors (see below), whose sum is σ = 2630283040. Its totient is φ = 390960000.

The previous prime is 1031889997. The next prime is 1031890001. The reversal of 1031890000 is 981301.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031890001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 187285 + ... + 192715.

Almost surely, 2^1031890000 is an apocalyptic number.

1031890000 is a gapful number since it is divisible by the number (10) 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 1031890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315141520).

1031890000 is an abundant number, since it is smaller than the sum of its proper divisors (1598393040).

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

1031890000 is an equidigital number, since it uses as much as digits as its factorization.

1031890000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1031890000 is about 32123.0446875759. The cubic root of 1031890000 is about 1010.5189634387.

The spelling of 1031890000 in words is "one billion, thirty-one million, eight hundred ninety thousand".