1890396 has 18 divisors (see below), whose sum is σ = 4778592. Its totient is φ = 630120.

The previous prime is 1890389. The next prime is 1890397. The reversal of 1890396 is 6930981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 52511 = 1890396 / (1 + 8 + 9 + 0 + 3 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1890396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26220 + ... + 26291.

2^1890396 is an apocalyptic number.

It is an amenable number.

1890396 is an abundant number, since it is smaller than the sum of its proper divisors (2888196).

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

1890396 is a wasteful number, since it uses less digits than its factorization.

1890396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52521 (or 52516 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1890396 is about 1374.9167247510. The cubic root of 1890396 is about 123.6471934652.

The spelling of 1890396 in words is "one million, eight hundred ninety thousand, three hundred ninety-six".