2661438 has 32 divisors (see below), whose sum is σ = 5796000. Its totient is φ = 809856.

The previous prime is 2661427. The next prime is 2661457. The reversal of 2661438 is 8341662.

2661438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2²¹ + 6 + 6 + 1 + 4³ + 3¹² + 8⁵ .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11508 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (181125).

2^2661438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2898000).

2661438 is an abundant number, since it is smaller than the sum of its proper divisors (3134562).

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

2661438 is a wasteful number, since it uses less digits than its factorization.

2661438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 6912, while the sum is 30.

The square root of 2661438 is about 1631.3914306505. The cubic root of 2661438 is about 138.5815616941.

The spelling of 2661438 in words is "two million, six hundred sixty-one thousand, four hundred thirty-eight".