2154784 has 36 divisors (see below), whose sum is σ = 4525794. Its totient is φ = 1009664.

The previous prime is 2154749. The next prime is 2154791. The reversal of 2154784 is 4874512.

It can be written as a sum of positive squares in 3 ways, for example, as 2016400 + 138384 = 1420^2 + 372^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9132 + ... + 9364.

2^2154784 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 2154784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262897).

2154784 is an abundant number, since it is smaller than the sum of its proper divisors (2371010).

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

2154784 is a wasteful number, since it uses less digits than its factorization.

2154784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 252 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 2154784 is about 1467.9182538548. The cubic root of 2154784 is about 129.1619463184.

The spelling of 2154784 in words is "two million, one hundred fifty-four thousand, seven hundred eighty-four".