1856628 has 24 divisors (see below), whose sum is σ = 4813760. Its totient is φ = 618840.

The previous prime is 1856599. The next prime is 1856639. The reversal of 1856628 is 8266581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1856592 and 1856601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8488 + ... + 8703.

2^1856628 is an apocalyptic number.

1856628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1856628 is an abundant number, since it is smaller than the sum of its proper divisors (2957132).

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

1856628 is a wasteful number, since it uses less digits than its factorization.

1856628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17204 (or 17196 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1856628 is about 1362.5813737168. The cubic root of 1856628 is about 122.9065322041.

The spelling of 1856628 in words is "one million, eight hundred fifty-six thousand, six hundred twenty-eight".