1861028 has 18 divisors (see below), whose sum is σ = 3527874. Its totient is φ = 858624.

The previous prime is 1861021. The next prime is 1861033. The reversal of 1861028 is 8201681.

It can be written as a sum of positive squares in 3 ways, for example, as 123904 + 1737124 = 352^2 + 1318^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 1860988 and 1861006.

It is not an unprimeable number, because it can be changed into a prime (1861021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701 + ... + 2052.

It is an arithmetic number, because the mean of its divisors is an integer number (195993).

2^1861028 is an apocalyptic number.

It is an amenable number.

1861028 is a deficient number, since it is larger than the sum of its proper divisors (1666846).

1861028 is a wasteful number, since it uses less digits than its factorization.

1861028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1861028 is about 1364.1950007239. The cubic root of 1861028 is about 123.0035471689.

The spelling of 1861028 in words is "one million, eight hundred sixty-one thousand, twenty-eight".