2691438 has 16 divisors (see below), whose sum is σ = 5399040. Its totient is φ = 894456.

The previous prime is 2691433. The next prime is 2691439. The reversal of 2691438 is 8341962.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2691399 and 2691408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691431) 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, 3273 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (337440).

2^2691438 is an apocalyptic number.

2691438 is an abundant number, since it is smaller than the sum of its proper divisors (2707602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2691438 is a wasteful number, since it uses less digits than its factorization.

2691438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 10368, while the sum is 33.

The square root of 2691438 is about 1640.5602701516. The cubic root of 2691438 is about 139.1003192093.

The spelling of 2691438 in words is "two million, six hundred ninety-one thousand, four hundred thirty-eight".