1899862668 has 192 divisors, whose sum is σ = 5738611200. Its totient is φ = 537477120.

The previous prime is 1899862667. The next prime is 1899862709. The reversal of 1899862668 is 8662689981.

1899862668 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1899862667) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1647180 + ... + 1648332.

It is an arithmetic number, because the mean of its divisors is an integer number (29888600).

Almost surely, 2^1899862668 is an apocalyptic number.

1899862668 is a gapful number since it is divisible by the number (18) 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 1899862668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2869305600).

1899862668 is an abundant number, since it is smaller than the sum of its proper divisors (3838748532).

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

1899862668 is a wasteful number, since it uses less digits than its factorization.

1899862668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1261 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The square root of 1899862668 is about 43587.4141008617. The cubic root of 1899862668 is about 1238.5324878161.

The spelling of 1899862668 in words is "one billion, eight hundred ninety-nine million, eight hundred sixty-two thousand, six hundred sixty-eight".