626381 has 8 divisors (see below), whose sum is σ = 732864. Its totient is φ = 524160.

The previous prime is 626377. The next prime is 626389. The reversal of 626381 is 183626.

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

It is not a de Polignac number, because 626381 - 2² = 626377 is a prime.

It is a super-2 number, since 2×626381² = 784706314322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 626381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626389) by changing a digit.

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, 740 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (91608).

2⁶²⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

626381 is a deficient number, since it is larger than the sum of its proper divisors (106483).

626381 is a wasteful number, since it uses less digits than its factorization.

626381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

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

The square root of 626381 is about 791.4423541863. The cubic root of 626381 is about 85.5617237234.

The spelling of 626381 in words is "six hundred twenty-six thousand, three hundred eighty-one".