2745638 has 8 divisors (see below), whose sum is σ = 4706832. Its totient is φ = 1176696.

The previous prime is 2745637. The next prime is 2745643. The reversal of 2745638 is 8365472.

It is a happy number.

2745638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2745598 and 2745607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98045 + ... + 98072.

It is an arithmetic number, because the mean of its divisors is an integer number (588354).

2^2745638 is an apocalyptic number.

2745638 is a deficient number, since it is larger than the sum of its proper divisors (1961194).

2745638 is a wasteful number, since it uses less digits than its factorization.

2745638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196126.

The product of its digits is 40320, while the sum is 35.

The square root of 2745638 is about 1656.9966807450. The cubic root of 2745638 is about 140.0278516017.

The spelling of 2745638 in words is "two million, seven hundred forty-five thousand, six hundred thirty-eight".