2600406 has 24 divisors (see below), whose sum is σ = 5714280. Its totient is φ = 854496.

The previous prime is 2600393. The next prime is 2600407. The reversal of 2600406 is 6040062.

2600406 is a `hidden beast` number, since 260 + 0 + 406 = 666.

It is a super-2 number, since 2×2600406² = 13524222729672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2600407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (238095).

2^2600406 is an apocalyptic number.

2600406 is an abundant number, since it is smaller than the sum of its proper divisors (3113874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2600406 is a wasteful number, since it uses less digits than its factorization.

2600406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2600406 is about 1612.5774400009. The cubic root of 2600406 is about 137.5140437446.

Adding to 2600406 its reverse (6040062), we get a palindrome (8640468).

The spelling of 2600406 in words is "two million, six hundred thousand, four hundred six".