1990475 has 12 divisors (see below), whose sum is σ = 2495376. Its totient is φ = 1574880.

The previous prime is 1990463. The next prime is 1990481. The reversal of 1990475 is 5740991.

It is a de Polignac number, because none of the positive numbers 2^k-1990475 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2189 + ... + 2961.

It is an arithmetic number, because the mean of its divisors is an integer number (207948).

2^1990475 is an apocalyptic number.

1990475 is a deficient number, since it is larger than the sum of its proper divisors (504901).

1990475 is a wasteful number, since it uses less digits than its factorization.

1990475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1990475 is about 1410.8419472074. The cubic root of 1990475 is about 125.7917741602.

The spelling of 1990475 in words is "one million, nine hundred ninety thousand, four hundred seventy-five".