1890120996 has 72 divisors (see below), whose sum is σ = 5064643584. Its totient is φ = 592300800.

The previous prime is 1890120983. The next prime is 1890121019. The reversal of 1890120996 is 6990210981.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 967821 + ... + 969771.

It is an arithmetic number, because the mean of its divisors is an integer number (70342272).

Almost surely, 2^1890120996 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 1890120996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2532321792).

1890120996 is an abundant number, since it is smaller than the sum of its proper divisors (3174522588).

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

1890120996 is a wasteful number, since it uses less digits than its factorization.

1890120996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561 (or 3556 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1890120996 is about 43475.5218025040. The cubic root of 1890120996 is about 1236.4119734555.

The spelling of 1890120996 in words is "one billion, eight hundred ninety million, one hundred twenty thousand, nine hundred ninety-six".