1891441488 has 80 divisors (see below), whose sum is σ = 5445990720. Its totient is φ = 562157568.

The previous prime is 1891441483. The next prime is 1891441511. The reversal of 1891441488 is 8841441981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891441483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45495 + ... + 76502.

It is an arithmetic number, because the mean of its divisors is an integer number (68074884).

Almost surely, 2^1891441488 is an apocalyptic number.

It is an amenable number.

1891441488 is an abundant number, since it is smaller than the sum of its proper divisors (3554549232).

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

1891441488 is a wasteful number, since it uses less digits than its factorization.

1891441488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122044 (or 122038 counting only the distinct ones).

The product of its digits is 294912, while the sum is 48.

The square root of 1891441488 is about 43490.7057657150. The cubic root of 1891441488 is about 1236.6998372238.

The spelling of 1891441488 in words is "one billion, eight hundred ninety-one million, four hundred forty-one thousand, four hundred eighty-eight".