1628090 has 32 divisors (see below), whose sum is σ = 3173904. Its totient is φ = 599040.

The previous prime is 1628071. The next prime is 1628093. The reversal of 1628090 is 908261.

It can be written as a sum of positive squares in 8 ways, for example, as 312481 + 1315609 = 559^2 + 1147^2 .

It is a Curzon number.

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 (1628093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10292 + ... + 10448.

2^1628090 is an apocalyptic number.

1628090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1628090 is a deficient number, since it is larger than the sum of its proper divisors (1545814).

1628090 is a wasteful number, since it uses less digits than its factorization.

1628090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1628090 is about 1275.9663004954. The cubic root of 1628090 is about 117.6412064246.

The spelling of 1628090 in words is "one million, six hundred twenty-eight thousand, ninety".