626490 has 24 divisors (see below), whose sum is σ = 1629108. Its totient is φ = 167040.

The previous prime is 626489. The next prime is 626519. The reversal of 626490 is 94626.

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 3969 = 789^2 + 63^2 .

It is an Ulam number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 3391 + ... + 3570.

2⁶²⁶⁴⁹⁰ is an apocalyptic number.

626490 is an abundant number, since it is smaller than the sum of its proper divisors (1002618).

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

626490 is a wasteful number, since it uses less digits than its factorization.

626490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6971 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 626490 is about 791.5112128075. The cubic root of 626490 is about 85.5666864574.

The spelling of 626490 in words is "six hundred twenty-six thousand, four hundred ninety".