2644992 has 132 divisors (see below), whose sum is σ = 8941296. Its totient is φ = 737280.

The previous prime is 2644981. The next prime is 2645011. The reversal of 2644992 is 2994462.

2644992 is a `hidden beast` number, since 2 + 644 + 9 + 9 + 2 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 2¹³ + 6 + 4⁶ + 4⁶ + 9 + 9⁶ + 2²¹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64492 + ... + 64532.

2^2644992 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 2644992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4470648).

2644992 is an abundant number, since it is smaller than the sum of its proper divisors (6296304).

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

2644992 is a wasteful number, since it uses less digits than its factorization.

2644992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 53 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 2644992 is about 1626.3431372254. The cubic root of 2644992 is about 138.2955229642.

The spelling of 2644992 in words is "two million, six hundred forty-four thousand, nine hundred ninety-two".