1097388 has 36 divisors (see below), whose sum is σ = 2879240. Its totient is φ = 365472.

The previous prime is 1097381. The next prime is 1097413. The reversal of 1097388 is 8837901.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1097381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 408 + ... + 1536.

2^1097388 is an apocalyptic number.

1097388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439620).

1097388 is an abundant number, since it is smaller than the sum of its proper divisors (1781852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1097388 is a wasteful number, since it uses less digits than its factorization.

1097388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1097388 is about 1047.5628859405. The cubic root of 1097388 is about 103.1462402530.

It can be divided in two parts, 109738 and 8, that added together give a triangular number (109746 = T₄₆₈).

The spelling of 1097388 in words is "one million, ninety-seven thousand, three hundred eighty-eight".