2638942 has 16 divisors (see below), whose sum is σ = 4134240. Its totient is φ = 1261792.

The previous prime is 2638931. The next prime is 2638949. The reversal of 2638942 is 2498362.

It is a d-powerful number, because it can be written as 2¹¹ + 6⁵ + 3¹² + 8³ + 9 + 4 + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 2638898 and 2638907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638949) 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, 9903 + ... + 10165.

It is an arithmetic number, because the mean of its divisors is an integer number (258390).

2^2638942 is an apocalyptic number.

2638942 is a deficient number, since it is larger than the sum of its proper divisors (1495298).

2638942 is a wasteful number, since it uses less digits than its factorization.

2638942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467.

The product of its digits is 20736, while the sum is 34.

The square root of 2638942 is about 1624.4820713077. The cubic root of 2638942 is about 138.1899994369.

The spelling of 2638942 in words is "two million, six hundred thirty-eight thousand, nine hundred forty-two".