2691406 has 8 divisors (see below), whose sum is σ = 4274640. Its totient is φ = 1266528.

The previous prime is 2691401. The next prime is 2691421. The reversal of 2691406 is 6041962.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39546 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (534330).

2^2691406 is an apocalyptic number.

2691406 is a deficient number, since it is larger than the sum of its proper divisors (1583234).

2691406 is a wasteful number, since it uses less digits than its factorization.

2691406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79178.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2691406 is about 1640.5505173569. The cubic root of 2691406 is about 139.0997679268.

The spelling of 2691406 in words is "two million, six hundred ninety-one thousand, four hundred six".