1800628 has 12 divisors (see below), whose sum is σ = 3183012. Its totient is φ = 891200.

The previous prime is 1800619. The next prime is 1800637. The reversal of 1800628 is 8260081.

It is an interprime number because it is at equal distance from previous prime (1800619) and next prime (1800637).

It can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 258064 = 1242^2 + 508^2 .

It is a super-2 number, since 2×1800628² = 6484522388768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1825 + ... + 2632.

It is an arithmetic number, because the mean of its divisors is an integer number (265251).

2^1800628 is an apocalyptic number.

It is an amenable number.

1800628 is a deficient number, since it is larger than the sum of its proper divisors (1382384).

1800628 is a wasteful number, since it uses less digits than its factorization.

1800628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562 (or 4560 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1800628 is about 1341.8748078714. The cubic root of 1800628 is about 121.6581850179.

The spelling of 1800628 in words is "one million, eight hundred thousand, six hundred twenty-eight".