1890985608 has 64 divisors (see below), whose sum is σ = 5256820800. Its totient is φ = 629838720.

The previous prime is 1890985573. The next prime is 1890985627. The reversal of 1890985608 is 8065890981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369628 + ... + 374708.

It is an arithmetic number, because the mean of its divisors is an integer number (82137825).

Almost surely, 2^1890985608 is an apocalyptic number.

1890985608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1890985608 is an abundant number, since it is smaller than the sum of its proper divisors (3365835192).

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

1890985608 is a wasteful number, since it uses less digits than its factorization.

1890985608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819 (or 6809 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 1890985608 is about 43485.4643300494. The cubic root of 1890985608 is about 1236.6004717351.

The spelling of 1890985608 in words is "one billion, eight hundred ninety million, nine hundred eighty-five thousand, six hundred eight".