626138 has 8 divisors (see below), whose sum is σ = 969600. Its totient is φ = 302940.

The previous prime is 626117. The next prime is 626147. The reversal of 626138 is 831626.

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

It is a d-powerful number, because it can be written as 6⁷ + 2¹⁵ + 1 + 6⁷ + 3⁶ + 8⁵ .

626138 is a modest number, since divided by 6138 gives 62 as remainder.

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 3 ways as a sum of consecutive naturals, for example, 4988 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (121200).

2⁶²⁶¹³⁸ is an apocalyptic number.

626138 is a deficient number, since it is larger than the sum of its proper divisors (343462).

626138 is a wasteful number, since it uses less digits than its factorization.

626138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10132.

The product of its digits is 1728, while the sum is 26.

The square root of 626138 is about 791.2888221124. The cubic root of 626138 is about 85.5506579407.

The spelling of 626138 in words is "six hundred twenty-six thousand, one hundred thirty-eight".