2638542 has 16 divisors (see below), whose sum is σ = 5312592. Its totient is φ = 873600.

The previous prime is 2638529. The next prime is 2638543. The reversal of 2638542 is 2458362.

It is a d-powerful number, because it can be written as 2¹³ + 6³ + 3¹² + 8³ + 5 + 4⁵ + 2²¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459 + ... + 2342.

It is an arithmetic number, because the mean of its divisors is an integer number (332037).

2^2638542 is an apocalyptic number.

2638542 is an abundant number, since it is smaller than the sum of its proper divisors (2674050).

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

2638542 is a wasteful number, since it uses less digits than its factorization.

2638542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963.

The product of its digits is 11520, while the sum is 30.

The square root of 2638542 is about 1624.3589504786. The cubic root of 2638542 is about 138.1830169931.

The spelling of 2638542 in words is "two million, six hundred thirty-eight thousand, five hundred forty-two".