626420 has 12 divisors (see below), whose sum is σ = 1315524. Its totient is φ = 250560.

The previous prime is 626393. The next prime is 626443. The reversal of 626420 is 24626.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 343396 = 532^2 + 586^2 .

It is a super-3 number, since 3×626420³ = 737425413339864000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 31321 = 626420 / (6 + 2 + 6 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 626392 and 626401.

It is a congruent number.

It is an unprimeable number.

626420 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 15641 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (109627).

2⁶²⁶⁴²⁰ is an apocalyptic number.

It is an amenable number.

626420 is an abundant number, since it is smaller than the sum of its proper divisors (689104).

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

626420 is a wasteful number, since it uses less digits than its factorization.

626420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31330 (or 31328 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 626420 is about 791.4669923629. The cubic root of 626420 is about 85.5634994467.

The spelling of 626420 in words is "six hundred twenty-six thousand, four hundred twenty".