2187648 has 80 divisors (see below), whose sum is σ = 6541260. Its totient is φ = 725760.

The previous prime is 2187629. The next prime is 2187667. The reversal of 2187648 is 8467812.

2187648 is a `hidden beast` number, since 2 + 1 + 8 + 7 + 648 = 666.

It is an interprime number because it is at equal distance from previous prime (2187629) and next prime (2187667).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10263 + ... + 10473.

2^2187648 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 2187648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3270630).

2187648 is an abundant number, since it is smaller than the sum of its proper divisors (4353612).

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

2187648 is an equidigital number, since it uses as much as digits as its factorization.

2187648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 216 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2187648 is about 1479.0699780605. The cubic root of 2187648 is about 129.8152800579.

The spelling of 2187648 in words is "two million, one hundred eighty-seven thousand, six hundred forty-eight".