1628560 has 20 divisors (see below), whose sum is σ = 3786588. Its totient is φ = 651392.

The previous prime is 1628551. The next prime is 1628567. The reversal of 1628560 is 658261.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 861184 = 876^2 + 928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 12.

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 3 ways as a sum of consecutive naturals, for example, 10099 + ... + 10258.

2^1628560 is an apocalyptic number.

1628560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628560 is an abundant number, since it is smaller than the sum of its proper divisors (2158028).

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

1628560 is a wasteful number, since it uses less digits than its factorization.

1628560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20370 (or 20364 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1628560 is about 1276.1504613485. The cubic root of 1628560 is about 117.6525256283.

Subtracting from 1628560 its reverse (658261), we obtain a cube (970299 = 99³).

The spelling of 1628560 in words is "one million, six hundred twenty-eight thousand, five hundred sixty".