2645406 has 16 divisors (see below), whose sum is σ = 5878800. Its totient is φ = 881784.

The previous prime is 2645399. The next prime is 2645413. The reversal of 2645406 is 6045462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2645399) and next prime (2645413).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2645406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24441 + ... + 24548.

It is an arithmetic number, because the mean of its divisors is an integer number (367425).

2^2645406 is an apocalyptic number.

2645406 is an abundant number, since it is smaller than the sum of its proper divisors (3233394).

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

2645406 is a wasteful number, since it uses less digits than its factorization.

2645406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49000 (or 48994 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2645406 is about 1626.4704116583. The cubic root of 2645406 is about 138.3027380281.

The spelling of 2645406 in words is "two million, six hundred forty-five thousand, four hundred six".