1662988 has 12 divisors (see below), whose sum is σ = 2945880. Its totient is φ = 821312.

The previous prime is 1662979. The next prime is 1663009. The reversal of 1662988 is 8892661.

It is a self number, because there is not a number n which added to its sum of digits gives 1662988.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (245490).

2^1662988 is an apocalyptic number.

It is an amenable number.

1662988 is a deficient number, since it is larger than the sum of its proper divisors (1282892).

1662988 is a wasteful number, since it uses less digits than its factorization.

1662988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096 (or 5094 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1662988 is about 1289.5689202210. The cubic root of 1662988 is about 118.4758150600.

The spelling of 1662988 in words is "one million, six hundred sixty-two thousand, nine hundred eighty-eight".