1891343896 has 48 divisors (see below), whose sum is σ = 3846864960. Its totient is φ = 871378560.

The previous prime is 1891343887. The next prime is 1891343917. The reversal of 1891343896 is 6983431981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1165966 + ... + 1167586.

It is an arithmetic number, because the mean of its divisors is an integer number (80143020).

Almost surely, 2^1891343896 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 1891343896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923432480).

1891343896 is an abundant number, since it is smaller than the sum of its proper divisors (1955521064).

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

1891343896 is a wasteful number, since it uses less digits than its factorization.

1891343896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516 (or 2499 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 1891343896 is about 43489.5837643912. The cubic root of 1891343896 is about 1236.6785670114.

The spelling of 1891343896 in words is "one billion, eight hundred ninety-one million, three hundred forty-three thousand, eight hundred ninety-six".