626406 has 16 divisors (see below), whose sum is σ = 1366848. Its totient is φ = 189800.

The previous prime is 626393. The next prime is 626443. The reversal of 626406 is 604626.

626406 = 114² + 115² + ... + 149².

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 626406.

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 7 ways as a sum of consecutive naturals, for example, 4680 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (85428).

2⁶²⁶⁴⁰⁶ is an apocalyptic number.

626406 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

626406 is an abundant number, since it is smaller than the sum of its proper divisors (740442).

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

626406 is a wasteful number, since it uses less digits than its factorization.

626406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 626406 is about 791.4581479775. The cubic root of 626406 is about 85.5628620160.

The spelling of 626406 in words is "six hundred twenty-six thousand, four hundred six".