3400649 has 6 divisors (see below), whose sum is σ = 3955914. Its totient is φ = 2914800.

The previous prime is 3400637. The next prime is 3400673. The reversal of 3400649 is 9460043.

It can be written as a sum of positive squares in only one way, i.e., 3087049 + 313600 = 1757^2 + 560^2 .

It is not a de Polignac number, because 3400649 - 2⁸ = 3400393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3400609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34652 + ... + 34749.

It is an arithmetic number, because the mean of its divisors is an integer number (659319).

Almost surely, 2^3400649 is an apocalyptic number.

It is an amenable number.

3400649 is a deficient number, since it is larger than the sum of its proper divisors (555265).

3400649 is an equidigital number, since it uses as much as digits as its factorization.

3400649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69415 (or 69408 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 3400649 is about 1844.0848678952. The cubic root of 3400649 is about 150.3790266372.

The spelling of 3400649 in words is "three million, four hundred thousand, six hundred forty-nine".