2091403888 has 60 divisors (see below), whose sum is σ = 4720010400. Its totient is φ = 895109376.

The previous prime is 2091403883. The next prime is 2091403949. The reversal of 2091403888 is 8883041902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091403883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821145 + ... + 823687.

It is an arithmetic number, because the mean of its divisors is an integer number (78666840).

Almost surely, 2^2091403888 is an apocalyptic number.

2091403888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091403888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360005200).

2091403888 is an abundant number, since it is smaller than the sum of its proper divisors (2628606512).

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

2091403888 is a wasteful number, since it uses less digits than its factorization.

2091403888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614 (or 3601 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 2091403888 is about 45731.8695003823. The cubic root of 2091403888 is about 1278.8294735303.

The spelling of 2091403888 in words is "two billion, ninety-one million, four hundred three thousand, eight hundred eighty-eight".