626438 has 4 divisors (see below), whose sum is σ = 939660. Its totient is φ = 313218.

The previous prime is 626393. The next prime is 626443. The reversal of 626438 is 834626.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 626438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156608 + ... + 156611.

It is an arithmetic number, because the mean of its divisors is an integer number (234915).

2⁶²⁶⁴³⁸ is an apocalyptic number.

626438 is a deficient number, since it is larger than the sum of its proper divisors (313222).

626438 is a wasteful number, since it uses less digits than its factorization.

626438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313221.

The product of its digits is 6912, while the sum is 29.

The square root of 626438 is about 791.4783635704. The cubic root of 626438 is about 85.5643189864.

The spelling of 626438 in words is "six hundred twenty-six thousand, four hundred thirty-eight".