1089275408 has 80 divisors (see below), whose sum is σ = 2429844480. Its totient is φ = 468584448.

The previous prime is 1089275399. The next prime is 1089275437. The reversal of 1089275408 is 8045729801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376913 + ... + 379791.

It is an arithmetic number, because the mean of its divisors is an integer number (30373056).

Almost surely, 2^1089275408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089275408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214922240).

1089275408 is an abundant number, since it is smaller than the sum of its proper divisors (1340569072).

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

1089275408 is a wasteful number, since it uses less digits than its factorization.

1089275408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1089275408 is about 33004.1725846900. The cubic root of 1089275408 is about 1028.9143706391.

The spelling of 1089275408 in words is "one billion, eighty-nine million, two hundred seventy-five thousand, four hundred eight".