1097788 has 12 divisors (see below), whose sum is σ = 1937152. Its totient is φ = 544320.

The previous prime is 1097783. The next prime is 1097791. The reversal of 1097788 is 8877901.

It is a self number, because there is not a number n which added to its sum of digits gives 1097788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097783) by changing a digit.

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, 573 + ... + 1588.

2^1097788 is an apocalyptic number.

It is an amenable number.

1097788 is a deficient number, since it is larger than the sum of its proper divisors (839364).

1097788 is a wasteful number, since it uses less digits than its factorization.

1097788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1097788 is about 1047.7537878719. The cubic root of 1097788 is about 103.1587710638.

The spelling of 1097788 in words is "one million, ninety-seven thousand, seven hundred eighty-eight".