1890636 has 24 divisors (see below), whose sum is σ = 4812864. Its totient is φ = 572880.

The previous prime is 1890631. The next prime is 1890641. The reversal of 1890636 is 6360981.

It is an interprime number because it is at equal distance from previous prime (1890631) and next prime (1890641).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1890597 and 1890606.

It is not an unprimeable number, because it can be changed into a prime (1890631) 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 7 ways as a sum of consecutive naturals, for example, 7030 + ... + 7293.

It is an arithmetic number, because the mean of its divisors is an integer number (200536).

2^1890636 is an apocalyptic number.

It is an amenable number.

1890636 is an abundant number, since it is smaller than the sum of its proper divisors (2922228).

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

1890636 is a wasteful number, since it uses less digits than its factorization.

1890636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14341 (or 14339 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1890636 is about 1375.0039999942. The cubic root of 1890636 is about 123.6524258911.

The spelling of 1890636 in words is "one million, eight hundred ninety thousand, six hundred thirty-six".