1669988 has 12 divisors (see below), whose sum is σ = 2945712. Its totient is φ = 828360.

The previous prime is 1669979. The next prime is 1669999. The reversal of 1669988 is 8899661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (245476).

2^1669988 is an apocalyptic number.

It is an amenable number.

1669988 is a deficient number, since it is larger than the sum of its proper divisors (1275724).

1669988 is a wasteful number, since it uses less digits than its factorization.

1669988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322 (or 3320 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 1669988 is about 1292.2801553843. The cubic root of 1669988 is about 118.6418154135.

The spelling of 1669988 in words is "one million, six hundred sixty-nine thousand, nine hundred eighty-eight".