1820628 has 36 divisors (see below), whose sum is σ = 4656288. Its totient is φ = 599760.

The previous prime is 1820617. The next prime is 1820629. The reversal of 1820628 is 8260281.

1820628 is a `hidden beast` number, since 18 + 20 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820629) 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 11 ways as a sum of consecutive naturals, for example, 3463 + ... + 3953.

2^1820628 is an apocalyptic number.

1820628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1820628 is an abundant number, since it is smaller than the sum of its proper divisors (2835660).

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

1820628 is a wasteful number, since it uses less digits than its factorization.

1820628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1820628 is about 1349.3064885340. The cubic root of 1820628 is about 122.1069562812.

The spelling of 1820628 in words is "one million, eight hundred twenty thousand, six hundred twenty-eight".