2155776 has 72 divisors (see below), whose sum is σ = 6573504. Its totient is φ = 614400.

The previous prime is 2155733. The next prime is 2155781. The reversal of 2155776 is 6775512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5176 + ... + 5576.

2^2155776 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 2155776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3286752).

2155776 is an abundant number, since it is smaller than the sum of its proper divisors (4417728).

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

2155776 is an equidigital number, since it uses as much as digits as its factorization.

2155776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 413 counting only the distinct ones).

The product of its digits is 14700, while the sum is 33.

The square root of 2155776 is about 1468.2561084497. The cubic root of 2155776 is about 129.1817640811.

The spelling of 2155776 in words is "two million, one hundred fifty-five thousand, seven hundred seventy-six".