1089155340 has 576 divisors, whose sum is σ = 4402944000. Its totient is φ = 216082944.

The previous prime is 1089155339. The next prime is 1089155369. The reversal of 1089155340 is 435519801.

1089155340 is a `hidden beast` number, since 10 + 8 + 91 + 553 + 4 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1089155295 and 1089155304.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 18460231 + ... + 18460289.

It is an arithmetic number, because the mean of its divisors is an integer number (7644000).

Almost surely, 2^1089155340 is an apocalyptic number.

1089155340 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 1089155340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2201472000).

1089155340 is an abundant number, since it is smaller than the sum of its proper divisors (3313788660).

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

1089155340 is a wasteful number, since it uses less digits than its factorization.

1089155340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1089155340 is about 33002.3535524362. The cubic root of 1089155340 is about 1028.8765643968.

The spelling of 1089155340 in words is "one billion, eighty-nine million, one hundred fifty-five thousand, three hundred forty".