3405657 has 16 divisors (see below), whose sum is σ = 4700160. Its totient is φ = 2192400.

The previous prime is 3405653. The next prime is 3405671. The reversal of 3405657 is 7565043.

It is not a de Polignac number, because 3405657 - 2² = 3405653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3405653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12432 + ... + 12702.

It is an arithmetic number, because the mean of its divisors is an integer number (293760).

Almost surely, 2^3405657 is an apocalyptic number.

It is an amenable number.

3405657 is a deficient number, since it is larger than the sum of its proper divisors (1294503).

3405657 is a wasteful number, since it uses less digits than its factorization.

3405657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 3405657 is about 1845.4422234251. The cubic root of 3405657 is about 150.4528094928.

The spelling of 3405657 in words is "three million, four hundred five thousand, six hundred fifty-seven".