1628856 has 32 divisors (see below), whose sum is σ = 4525200. Its totient is φ = 542880.

The previous prime is 1628839. The next prime is 1628857. The reversal of 1628856 is 6588261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1628856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628857) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3555 + ... + 3986.

2^1628856 is an apocalyptic number.

It is an amenable number.

1628856 is an abundant number, since it is smaller than the sum of its proper divisors (2896344).

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

1628856 is a wasteful number, since it uses less digits than its factorization.

1628856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7556 (or 7546 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1628856 is about 1276.2664298649. The cubic root of 1628856 is about 117.6596532007.

The spelling of 1628856 in words is "one million, six hundred twenty-eight thousand, eight hundred fifty-six".