1861328 has 20 divisors (see below), whose sum is σ = 4121760. Its totient is φ = 797664.

The previous prime is 1861309. The next prime is 1861331. The reversal of 1861328 is 8231681.

It is a self number, because there is not a number n which added to its sum of digits gives 1861328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8198 + ... + 8421.

It is an arithmetic number, because the mean of its divisors is an integer number (206088).

2^1861328 is an apocalyptic number.

It is an amenable number.

1861328 is an abundant number, since it is smaller than the sum of its proper divisors (2260432).

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

1861328 is a wasteful number, since it uses less digits than its factorization.

1861328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16634 (or 16628 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1861328 is about 1364.3049512481. The cubic root of 1861328 is about 123.0101562548.

The spelling of 1861328 in words is "one million, eight hundred sixty-one thousand, three hundred twenty-eight".