1990064 has 20 divisors (see below), whose sum is σ = 3920880. Its totient is φ = 978240.

The previous prime is 1990039. The next prime is 1990069. The reversal of 1990064 is 4600991.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1990069) 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, 44 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (196044).

2^1990064 is an apocalyptic number.

It is an amenable number.

1990064 is a deficient number, since it is larger than the sum of its proper divisors (1930816).

1990064 is a wasteful number, since it uses less digits than its factorization.

1990064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1990064 is about 1410.6962819828. The cubic root of 1990064 is about 125.7831155942.

The spelling of 1990064 in words is "one million, nine hundred ninety thousand, sixty-four".