2101788 has 60 divisors (see below), whose sum is σ = 5929000. Its totient is φ = 645408.

The previous prime is 2101751. The next prime is 2101789. The reversal of 2101788 is 8871012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101789) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3963 + ... + 4461.

2^2101788 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 2101788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2964500).

2101788 is an abundant number, since it is smaller than the sum of its proper divisors (3827212).

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

2101788 is a wasteful number, since it uses less digits than its factorization.

2101788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2101788 is about 1449.7544619693. The cubic root of 2101788 is about 128.0942502451.

The spelling of 2101788 in words is "two million, one hundred one thousand, seven hundred eighty-eight".