1151388 has 48 divisors (see below), whose sum is σ = 3413760. Its totient is φ = 328752.

The previous prime is 1151383. The next prime is 1151389. The reversal of 1151388 is 8831511.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6 + ... + 1517.

It is an arithmetic number, because the mean of its divisors is an integer number (71120).

2^1151388 is an apocalyptic number.

1151388 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 1151388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706880).

1151388 is an abundant number, since it is smaller than the sum of its proper divisors (2262372).

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

1151388 is a wasteful number, since it uses less digits than its factorization.

1151388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1535 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1151388 is about 1073.0274926580. The cubic root of 1151388 is about 104.8110888952.

Adding to 1151388 its reverse (8831511), we get a palindrome (9982899).

The spelling of 1151388 in words is "one million, one hundred fifty-one thousand, three hundred eighty-eight".