1890749900 has 144 divisors (see below), whose sum is σ = 4552187808. Its totient is φ = 677376000.

The previous prime is 1890749873. The next prime is 1890749933. The reversal of 1890749900 is 99470981.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8960795 + ... + 8961005.

Almost surely, 2^1890749900 is an apocalyptic number.

1890749900 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 1890749900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2276093904).

1890749900 is an abundant number, since it is smaller than the sum of its proper divisors (2661437908).

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

1890749900 is a wasteful number, since it uses less digits than its factorization.

1890749900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1890749900 is about 43482.7540526126. The cubic root of 1890749900 is about 1236.5490895821.

The spelling of 1890749900 in words is "one billion, eight hundred ninety million, seven hundred forty-nine thousand, nine hundred".