2630405 has 8 divisors (see below), whose sum is σ = 3175200. Its totient is φ = 2091856.

The previous prime is 2630399. The next prime is 2630423. The reversal of 2630405 is 5040362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2630405 - 2⁴ = 2630389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (396900).

2^2630405 is an apocalyptic number.

It is an amenable number.

2630405 is a deficient number, since it is larger than the sum of its proper divisors (544795).

2630405 is a wasteful number, since it uses less digits than its factorization.

2630405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2630405 is about 1621.8523360652. The cubic root of 2630405 is about 138.0408231812.

Adding to 2630405 its reverse (5040362), we get a palindrome (7670767).

The spelling of 2630405 in words is "two million, six hundred thirty thousand, four hundred five".