1209988 has 12 divisors (see below), whose sum is σ = 2280460. Its totient is φ = 558432.

The previous prime is 1209979. The next prime is 1210003. The reversal of 1209988 is 8899021.

It can be written as a sum of positive squares in 2 ways, for example, as 322624 + 887364 = 568^2 + 942^2 .

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, 11583 + ... + 11686.

2^1209988 is an apocalyptic number.

It is an amenable number.

1209988 is a deficient number, since it is larger than the sum of its proper divisors (1070472).

1209988 is a wasteful number, since it uses less digits than its factorization.

1209988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23286 (or 23284 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1209988 is about 1099.9945454410. The cubic root of 1209988 is about 106.5598714103.

It can be divided in two parts, 1209 and 988, that added together give a cube (2197 = 13³).

The spelling of 1209988 in words is "one million, two hundred nine thousand, nine hundred eighty-eight".