1901889612 has 48 divisors (see below), whose sum is σ = 5635230720. Its totient is φ = 543396816.

The previous prime is 1901889599. The next prime is 1901889623. The reversal of 1901889612 is 2169881091.

1901889612 is a `hidden beast` number, since 19 + 0 + 18 + 8 + 9 + 612 = 666.

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, 1257108 + ... + 1258619.

It is an arithmetic number, because the mean of its divisors is an integer number (117400640).

Almost surely, 2^1901889612 is an apocalyptic number.

1901889612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1901889612 is an abundant number, since it is smaller than the sum of its proper divisors (3733341108).

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

1901889612 is a wasteful number, since it uses less digits than its factorization.

1901889612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515747 (or 2515739 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1901889612 is about 43610.6593850632. The cubic root of 1901889612 is about 1238.9727904723.

The spelling of 1901889612 in words is "one billion, nine hundred one million, eight hundred eighty-nine thousand, six hundred twelve".