2756638 has 4 divisors (see below), whose sum is σ = 4134960. Its totient is φ = 1378318.

The previous prime is 2756629. The next prime is 2756639. The reversal of 2756638 is 8366572.

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

It is a junction number, because it is equal to n+sod(n) for n = 2756597 and 2756606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2756639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689158 + ... + 689161.

It is an arithmetic number, because the mean of its divisors is an integer number (1033740).

2^2756638 is an apocalyptic number.

2756638 is a deficient number, since it is larger than the sum of its proper divisors (1378322).

2756638 is a wasteful number, since it uses less digits than its factorization.

2756638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378321.

The product of its digits is 60480, while the sum is 37.

The square root of 2756638 is about 1660.3126211651. The cubic root of 2756638 is about 140.2146028448.

It can be divided in two parts, 27 and 56638, that added together give a palindrome (56665).

The spelling of 2756638 in words is "two million, seven hundred fifty-six thousand, six hundred thirty-eight".