2638453 has 4 divisors (see below), whose sum is σ = 2643660. Its totient is φ = 2633248.

The previous prime is 2638411. The next prime is 2638469. The reversal of 2638453 is 3548362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 2093809 = 738^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638453 - 2²¹ = 541301 is a prime.

It is a super-2 number, since 2×2638453² = 13922868466418, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 6⁴ + 3⁵ + 8⁷ + 4 + 5³ + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750 + ... + 2887.

It is an arithmetic number, because the mean of its divisors is an integer number (660915).

2^2638453 is an apocalyptic number.

It is an amenable number.

2638453 is a deficient number, since it is larger than the sum of its proper divisors (5207).

2638453 is an equidigital number, since it uses as much as digits as its factorization.

2638453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206.

The product of its digits is 17280, while the sum is 31.

The square root of 2638453 is about 1624.3315548249. The cubic root of 2638453 is about 138.1814633034.

Subtracting 2638453 from its reverse (3548362), we obtain a palindrome (909909).

The spelling of 2638453 in words is "two million, six hundred thirty-eight thousand, four hundred fifty-three".