626740 has 12 divisors (see below), whose sum is σ = 1316196. Its totient is φ = 250688.

The previous prime is 626723. The next prime is 626741. The reversal of 626740 is 47626.

It can be written as a sum of positive squares in 2 ways, for example, as 443556 + 183184 = 666^2 + 428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15649 + ... + 15688.

It is an arithmetic number, because the mean of its divisors is an integer number (109683).

2⁶²⁶⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

626740 is an abundant number, since it is smaller than the sum of its proper divisors (689456).

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

626740 is a wasteful number, since it uses less digits than its factorization.

626740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31346 (or 31344 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 626740 is about 791.6691228032. The cubic root of 626740 is about 85.5780667012.

The spelling of 626740 in words is "six hundred twenty-six thousand, seven hundred forty".