1626820 has 24 divisors (see below), whose sum is σ = 3679704. Its totient is φ = 600576.

The previous prime is 1626817. The next prime is 1626829. The reversal of 1626820 is 286261.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 1295044 = 576^2 + 1138^2 .

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1626829) 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, 2869 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (153321).

2^1626820 is an apocalyptic number.

1626820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1626820 is an abundant number, since it is smaller than the sum of its proper divisors (2052884).

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

1626820 is a wasteful number, since it uses less digits than its factorization.

1626820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279 (or 6277 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1626820 is about 1275.4685413604. The cubic root of 1626820 is about 117.6106095909.

The spelling of 1626820 in words is "one million, six hundred twenty-six thousand, eight hundred twenty".