1890770186956 has 144 divisors (see below), whose sum is σ = 4074242457600. Its totient is φ = 751148173440.

The previous prime is 1890770186909. The next prime is 1890770186983. The reversal of 1890770186956 is 6596810770981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1890770186891 and 1890770186900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99092625 + ... + 99111703.

It is an arithmetic number, because the mean of its divisors is an integer number (28293350400).

Almost surely, 2^{1890770186956} 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 1890770186956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037121228800).

1890770186956 is an abundant number, since it is smaller than the sum of its proper divisors (2183472270644).

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

1890770186956 is a wasteful number, since it uses less digits than its factorization.

1890770186956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308 (or 19275 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 1890770186956 in words is "one trillion, eight hundred ninety billion, seven hundred seventy million, one hundred eighty-six thousand, nine hundred fifty-six".