1081432620 has 144 divisors (see below), whose sum is σ = 3519603360. Its totient is φ = 278401536.

The previous prime is 1081432619. The next prime is 1081432631. The reversal of 1081432620 is 262341801.

1081432620 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 4 + 32 + 620 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137104 + ... + 144776.

It is an arithmetic number, because the mean of its divisors is an integer number (24441690).

Almost surely, 2^1081432620 is an apocalyptic number.

1081432620 is a gapful number since it is divisible by the number (10) 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 1081432620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759801680).

1081432620 is an abundant number, since it is smaller than the sum of its proper divisors (2438170740).

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

1081432620 is a wasteful number, since it uses less digits than its factorization.

1081432620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7726 (or 7712 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1081432620 is about 32885.1428459723. The cubic root of 1081432620 is about 1026.4390241805.

It can be divided in two parts, 10814 and 32620, that added together give a palindrome (43434).

The spelling of 1081432620 in words is "one billion, eighty-one million, four hundred thirty-two thousand, six hundred twenty".