1890866516 has 96 divisors (see below), whose sum is σ = 4205779200. Its totient is φ = 728555520.

The previous prime is 1890866489. The next prime is 1890866519. The reversal of 1890866516 is 6156680981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890866519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4211060 + ... + 4211508.

It is an arithmetic number, because the mean of its divisors is an integer number (43810200).

Almost surely, 2^1890866516 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 1890866516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102889600).

1890866516 is an abundant number, since it is smaller than the sum of its proper divisors (2314912684).

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

1890866516 is a wasteful number, since it uses less digits than its factorization.

1890866516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 1890866516 is about 43484.0949773593. The cubic root of 1890866516 is about 1236.5745113198.

The spelling of 1890866516 in words is "one billion, eight hundred ninety million, eight hundred sixty-six thousand, five hundred sixteen".