1091852838 has 64 divisors (see below), whose sum is σ = 2470732800. Its totient is φ = 357346080.

The previous prime is 1091852831. The next prime is 1091852851. The reversal of 1091852838 is 8382581901.

It is a happy number.

1091852838 is a `hidden beast` number, since 1 + 0 + 91 + 8 + 528 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1091852793 and 1091852802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091852831) 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 31 ways as a sum of consecutive naturals, for example, 899520 + ... + 900732.

It is an arithmetic number, because the mean of its divisors is an integer number (38605200).

Almost surely, 2^1091852838 is an apocalyptic number.

1091852838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091852838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235366400).

1091852838 is an abundant number, since it is smaller than the sum of its proper divisors (1378879962).

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

1091852838 is a wasteful number, since it uses less digits than its factorization.

1091852838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1091852838 is about 33043.1965463392. The cubic root of 1091852838 is about 1029.7252662179.

The spelling of 1091852838 in words is "one billion, ninety-one million, eight hundred fifty-two thousand, eight hundred thirty-eight".