1990146 has 8 divisors (see below), whose sum is σ = 3980304. Its totient is φ = 663380.

The previous prime is 1990141. The next prime is 1990147. The reversal of 1990146 is 6410991.

It is a sphenic number, since it is the product of 3 distinct primes.

1990146 is an admirable number.

It is a super-2 number, since 2×1990146² = 7921362202632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165840 + ... + 165851.

It is an arithmetic number, because the mean of its divisors is an integer number (497538).

2^1990146 is an apocalyptic number.

1990146 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.

1990146 is a wasteful number, since it uses less digits than its factorization.

1990146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331696.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1990146 is about 1410.7253453454. The cubic root of 1990146 is about 125.7848431891.

The spelling of 1990146 in words is "one million, nine hundred ninety thousand, one hundred forty-six".