1089855408 has 20 divisors (see below), whose sum is σ = 2815459928. Its totient is φ = 363285120.

The previous prime is 1089855407. The next prime is 1089855419. The reversal of 1089855408 is 8045589801.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 22705321 = 1089855408 / (1 + 0 + 8 + 9 + 8 + 5 + 5 + 4 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (1089855401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11352613 + ... + 11352708.

Almost surely, 2^1089855408 is an apocalyptic number.

It is an amenable number.

1089855408 is an abundant number, since it is smaller than the sum of its proper divisors (1725604520).

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

1089855408 is a wasteful number, since it uses less digits than its factorization.

1089855408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22705332 (or 22705326 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 48.

The square root of 1089855408 is about 33012.9581831135. The cubic root of 1089855408 is about 1029.0969582082.

The spelling of 1089855408 in words is "one billion, eighty-nine million, eight hundred fifty-five thousand, four hundred eight".