1891036 has 12 divisors (see below), whose sum is σ = 3782128. Its totient is φ = 810432.

The previous prime is 1891027. The next prime is 1891039. The reversal of 1891036 is 6301981.

It is a happy number.

1891036 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 67537 = 1891036 / (1 + 8 + 9 + 1 + 0 + 3 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 1890995 and 1891013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891039) by changing a digit.

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, 33741 + ... + 33796.

2^1891036 is an apocalyptic number.

It is an amenable number.

1891036 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1891036 is a wasteful number, since it uses less digits than its factorization.

1891036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67548 (or 67546 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1891036 is about 1375.1494464239. The cubic root of 1891036 is about 123.6611456169.

It can be divided in two parts, 189 and 1036, that added together give a triangular number (1225 = T₄₉).

The spelling of 1891036 in words is "one million, eight hundred ninety-one thousand, thirty-six".