1990056 has 32 divisors (see below), whose sum is σ = 5009760. Its totient is φ = 658752.

The previous prime is 1990039. The next prime is 1990069. The reversal of 1990056 is 6500991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6646 + ... + 6938.

It is an arithmetic number, because the mean of its divisors is an integer number (156555).

2^1990056 is an apocalyptic number.

It is an amenable number.

1990056 is an abundant number, since it is smaller than the sum of its proper divisors (3019704).

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

1990056 is a wasteful number, since it uses less digits than its factorization.

1990056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 1990056 is about 1410.6934465007. The cubic root of 1990056 is about 125.7829470458.

The spelling of 1990056 in words is "one million, nine hundred ninety thousand, fifty-six".