2638386 has 16 divisors (see below), whose sum is σ = 5863200. Its totient is φ = 879444.

The previous prime is 2638381. The next prime is 2638403. The reversal of 2638386 is 6838362.

It is a super-2 number, since 2×2638386² = 13922161369992, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 6³ + 3⁴ + 8 + 3¹² + 8⁷ + 6⁴ .

It is a self number, because there is not a number n which added to its sum of digits gives 2638386.

It is not an unprimeable number, because it can be changed into a prime (2638381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24376 + ... + 24483.

It is an arithmetic number, because the mean of its divisors is an integer number (366450).

2^2638386 is an apocalyptic number.

2638386 is an abundant number, since it is smaller than the sum of its proper divisors (3224814).

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

2638386 is a wasteful number, since it uses less digits than its factorization.

2638386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48870 (or 48864 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2638386 is about 1624.3109308257. The cubic root of 2638386 is about 138.1802936487.

It can be divided in two parts, 263 and 8386, that added together give a square (8649 = 93²).

The spelling of 2638386 in words is "two million, six hundred thirty-eight thousand, three hundred eighty-six".