1216888 has 8 divisors (see below), whose sum is σ = 2281680. Its totient is φ = 608440.

The previous prime is 1216879. The next prime is 1216903. The reversal of 1216888 is 8886121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76048 + ... + 76063.

It is an arithmetic number, because the mean of its divisors is an integer number (285210).

2^1216888 is an apocalyptic number.

It is an amenable number.

1216888 is a deficient number, since it is larger than the sum of its proper divisors (1064792).

1216888 is a wasteful number, since it uses less digits than its factorization.

1216888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152117 (or 152113 counting only the distinct ones).

The product of its digits is 6144, while the sum is 34.

The square root of 1216888 is about 1103.1264660047. The cubic root of 1216888 is about 106.7620414325.

It can be divided in two parts, 12 and 16888, that added together give a square (16900 = 130²).

The spelling of 1216888 in words is "one million, two hundred sixteen thousand, eight hundred eighty-eight".