2638530 has 48 divisors (see below), whose sum is σ = 7225920. Its totient is φ = 666144.

The previous prime is 2638529. The next prime is 2638543. The reversal of 2638530 is 358362.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2638494 and 2638503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 939 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (150540).

2^2638530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2638530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3612960).

2638530 is an abundant number, since it is smaller than the sum of its proper divisors (4587390).

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

2638530 is a wasteful number, since it uses less digits than its factorization.

2638530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2638530 is about 1624.3552567096. The cubic root of 2638530 is about 138.1828075089.

The spelling of 2638530 in words is "two million, six hundred thirty-eight thousand, five hundred thirty".