1816628 has 48 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 748800.

The previous prime is 1816627. The next prime is 1816643. The reversal of 1816628 is 8266181.

It is an Ulam number.

Its product of digits (4608) is a multiple of the sum of its prime factors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1816594 and 1816603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34250 + ... + 34302.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^1816628 is an apocalyptic number.

It is an amenable number.

1816628 is an abundant number, since it is smaller than the sum of its proper divisors (1993612).

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

1816628 is a wasteful number, since it uses less digits than its factorization.

1816628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 126 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1816628 is about 1347.8234305724. The cubic root of 1816628 is about 122.0174659219.

The spelling of 1816628 in words is "one million, eight hundred sixteen thousand, six hundred twenty-eight".