1990072 has 16 divisors (see below), whose sum is σ = 4264560. Its totient is φ = 852864.

The previous prime is 1990069. The next prime is 1990081. The reversal of 1990072 is 2700991.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1990072.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17713 + ... + 17824.

It is an arithmetic number, because the mean of its divisors is an integer number (266535).

2^1990072 is an apocalyptic number.

It is an amenable number.

1990072 is an abundant number, since it is smaller than the sum of its proper divisors (2274488).

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

1990072 is a wasteful number, since it uses less digits than its factorization.

1990072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35550 (or 35546 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1990072 is about 1410.6991174591. The cubic root of 1990072 is about 125.7832841421.

The spelling of 1990072 in words is "one million, nine hundred ninety thousand, seventy-two".