2646406 has 16 divisors (see below), whose sum is σ = 4557600. Its totient is φ = 1128960.

The previous prime is 2646361. The next prime is 2646409. The reversal of 2646406 is 6046462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646409) 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, 5670 + ... + 6118.

It is an arithmetic number, because the mean of its divisors is an integer number (284850).

2^2646406 is an apocalyptic number.

2646406 is a deficient number, since it is larger than the sum of its proper divisors (1911194).

2646406 is a wasteful number, since it uses less digits than its factorization.

2646406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 2646406 is about 1626.7777967504. Note that the first 4 decimals coincide. The cubic root of 2646406 is about 138.3201626144.

It can be divided in two parts, 264 and 6406, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 2646406 in words is "two million, six hundred forty-six thousand, four hundred six".