626649 has 8 divisors (see below), whose sum is σ = 845280. Its totient is φ = 412896.

The previous prime is 626629. The next prime is 626663. The reversal of 626649 is 946626.

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

It is not a de Polignac number, because 626649 - 2⁵ = 626617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (626609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907 + ... + 1440.

It is an arithmetic number, because the mean of its divisors is an integer number (105660).

2⁶²⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

626649 is a deficient number, since it is larger than the sum of its proper divisors (218631).

626649 is a wasteful number, since it uses less digits than its factorization.

626649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its digits is 15552, while the sum is 33.

The square root of 626649 is about 791.6116472109. The cubic root of 626649 is about 85.5739246429.

It can be divided in two parts, 626 and 649, that added together give a triangular number (1275 = T₅₀).

The spelling of 626649 in words is "six hundred twenty-six thousand, six hundred forty-nine".