2685406 has 8 divisors (see below), whose sum is σ = 4158144. Its totient is φ = 1299360.

The previous prime is 2685401. The next prime is 2685407. The reversal of 2685406 is 6045862.

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

It is a super-2 number, since 2×2685406² = 14422810769672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685401) 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, 21595 + ... + 21718.

It is an arithmetic number, because the mean of its divisors is an integer number (519768).

2^2685406 is an apocalyptic number.

2685406 is a deficient number, since it is larger than the sum of its proper divisors (1472738).

2685406 is a wasteful number, since it uses less digits than its factorization.

2685406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43346.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2685406 is about 1638.7208426086. The cubic root of 2685406 is about 138.9963251448.

The spelling of 2685406 in words is "two million, six hundred eighty-five thousand, four hundred six".