626405 has 16 divisors (see below), whose sum is σ = 846720. Its totient is φ = 441408.

The previous prime is 626393. The next prime is 626443. The reversal of 626405 is 504626.

It is a cyclic number.

It is not a de Polignac number, because 626405 - 2⁴ = 626389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 626405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286 + ... + 1704.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁶²⁶⁴⁰⁵ is an apocalyptic number.

626405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

626405 is a deficient number, since it is larger than the sum of its proper divisors (220315).

626405 is a wasteful number, since it uses less digits than its factorization.

626405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 626405 is about 791.4575162319. The cubic root of 626405 is about 85.5628164849.

The spelling of 626405 in words is "six hundred twenty-six thousand, four hundred five".