626540 has 12 divisors (see below), whose sum is σ = 1315776. Its totient is φ = 250608.

The previous prime is 626539. The next prime is 626581. The reversal of 626540 is 45626.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 626540.

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, 15644 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (109648).

2⁶²⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

626540 is an abundant number, since it is smaller than the sum of its proper divisors (689236).

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

626540 is a wasteful number, since it uses less digits than its factorization.

626540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31336 (or 31334 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 626540 is about 791.5427973268. The cubic root of 626540 is about 85.5689627484.

The spelling of 626540 in words is "six hundred twenty-six thousand, five hundred forty".