1081421838 has 24 divisors (see below), whose sum is σ = 2677806768. Its totient is φ = 308977632.

The previous prime is 1081421837. The next prime is 1081421839. The reversal of 1081421838 is 8381241801.

It is an interprime number because it is at equal distance from previous prime (1081421837) and next prime (1081421839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081421837) 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, 4291231 + ... + 4291482.

It is an arithmetic number, because the mean of its divisors is an integer number (111575282).

Almost surely, 2^1081421838 is an apocalyptic number.

1081421838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1081421838 is an abundant number, since it is smaller than the sum of its proper divisors (1596384930).

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

1081421838 is a wasteful number, since it uses less digits than its factorization.

1081421838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582728 (or 8582725 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1081421838 is about 32884.9789113510. The cubic root of 1081421838 is about 1026.4356129332.

The spelling of 1081421838 in words is "one billion, eighty-one million, four hundred twenty-one thousand, eight hundred thirty-eight".