1628081 has 8 divisors (see below), whose sum is σ = 2003904. Its totient is φ = 1288080.

The previous prime is 1628071. The next prime is 1628093. The reversal of 1628081 is 1808261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1628081 - 2¹⁰ = 1627057 is a prime.

It is a super-2 number, since 2×1628081² = 5301295485122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1628081.

It is not an unprimeable number, because it can be changed into a prime (1628051) 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, 8855 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (250488).

2^1628081 is an apocalyptic number.

It is an amenable number.

1628081 is a deficient number, since it is larger than the sum of its proper divisors (375823).

1628081 is a wasteful number, since it uses less digits than its factorization.

1628081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17911.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1628081 is about 1275.9627737516. The cubic root of 1628081 is about 117.6409896526.

It can be divided in two parts, 16280 and 81, that added together give a palindrome (16361).

The spelling of 1628081 in words is "one million, six hundred twenty-eight thousand, eighty-one".