1899878628 has 48 divisors (see below), whose sum is σ = 4676000000. Its totient is φ = 598723488.

The previous prime is 1899878597. The next prime is 1899878633. The reversal of 1899878628 is 8268789981.

It is a super-2 number, since 2×1899878628² = 7219077602262324768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105423 + ... + 122121.

Almost surely, 2^1899878628 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 1899878628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2338000000).

1899878628 is an abundant number, since it is smaller than the sum of its proper divisors (2776121372).

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

1899878628 is a wasteful number, since it uses less digits than its factorization.

1899878628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17224 (or 17222 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 66.

The square root of 1899878628 is about 43587.5971808495. The cubic root of 1899878628 is about 1238.5359559480.

The spelling of 1899878628 in words is "one billion, eight hundred ninety-nine million, eight hundred seventy-eight thousand, six hundred twenty-eight".