1990191060 has 480 divisors, whose sum is σ = 7499568384. Its totient is φ = 439084800.

The previous prime is 1990191031. The next prime is 1990191079. The reversal of 1990191060 is 601910991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 28030825 + ... + 28030895.

Almost surely, 2^1990191060 is an apocalyptic number.

1990191060 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 1990191060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3749784192).

1990191060 is an abundant number, since it is smaller than the sum of its proper divisors (5509377324).

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

1990191060 is a wasteful number, since it uses less digits than its factorization.

1990191060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 1990191060 is about 44611.5574711307. The cubic root of 1990191060 is about 1257.8579250346.

The spelling of 1990191060 in words is "one billion, nine hundred ninety million, one hundred ninety-one thousand, sixty".