2638763 has 4 divisors (see below), whose sum is σ = 2649528. Its totient is φ = 2628000.

The previous prime is 2638747. The next prime is 2638771. The reversal of 2638763 is 3678362.

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

It is a cyclic number.

It is not a de Polignac number, because 2638763 - 2⁴ = 2638747 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 6⁴ + 3⁵ + 8³ + 7³ + 6⁵ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638793) 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, 5006 + ... + 5507.

It is an arithmetic number, because the mean of its divisors is an integer number (662382).

2^2638763 is an apocalyptic number.

2638763 is a deficient number, since it is larger than the sum of its proper divisors (10765).

2638763 is a wasteful number, since it uses less digits than its factorization.

2638763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10764.

The product of its digits is 36288, while the sum is 35.

The square root of 2638763 is about 1624.4269758903. The cubic root of 2638763 is about 138.1868748805.

The spelling of 2638763 in words is "two million, six hundred thirty-eight thousand, seven hundred sixty-three".