1628564 has 24 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 697368.

The previous prime is 1628551. The next prime is 1628567. The reversal of 1628564 is 4658261.

It is a self number, because there is not a number n which added to its sum of digits gives 1628564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628567) 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, 779 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^1628564 is an apocalyptic number.

1628564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663200).

1628564 is an abundant number, since it is smaller than the sum of its proper divisors (1697836).

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

1628564 is a wasteful number, since it uses less digits than its factorization.

1628564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1196 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 1628564 is about 1276.1520285609. The cubic root of 1628564 is about 117.6526219526.

The spelling of 1628564 in words is "one million, six hundred twenty-eight thousand, five hundred sixty-four".