2638257 has 8 divisors (see below), whose sum is σ = 3525984. Its totient is φ = 1754688.

The previous prime is 2638253. The next prime is 2638267. The reversal of 2638257 is 7528362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2638257 - 2² = 2638253 is a prime.

It is a d-powerful number, because it can be written as 2²⁰ + 6² + 3³ + 8⁵ + 2²⁰ + 5⁸ + 7⁶ .

It is not an unprimeable number, because it can be changed into a prime (2638253) 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, 1038 + ... + 2520.

It is an arithmetic number, because the mean of its divisors is an integer number (440748).

2^2638257 is an apocalyptic number.

It is an amenable number.

2638257 is a deficient number, since it is larger than the sum of its proper divisors (887727).

2638257 is a wasteful number, since it uses less digits than its factorization.

2638257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079.

The product of its digits is 20160, while the sum is 33.

The square root of 2638257 is about 1624.2712211943. The cubic root of 2638257 is about 138.1780415713.

It can be divided in two parts, 26 and 38257, that added together give a palindrome (38283).

The spelling of 2638257 in words is "two million, six hundred thirty-eight thousand, two hundred fifty-seven".