2772638 has 16 divisors (see below), whose sum is σ = 4567536. Its totient is φ = 1251840.

The previous prime is 2772631. The next prime is 2772643. The reversal of 2772638 is 8362772.

It is a junction number, because it is equal to n+sod(n) for n = 2772598 and 2772607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2772631) 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, 3920 + ... + 4572.

It is an arithmetic number, because the mean of its divisors is an integer number (285471).

2^2772638 is an apocalyptic number.

2772638 is a deficient number, since it is larger than the sum of its proper divisors (1794898).

2772638 is a wasteful number, since it uses less digits than its factorization.

2772638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859.

The product of its digits is 28224, while the sum is 35.

The square root of 2772638 is about 1665.1240194052. The cubic root of 2772638 is about 140.4853562242.

The spelling of 2772638 in words is "two million, seven hundred seventy-two thousand, six hundred thirty-eight".