1089625920 has 224 divisors, whose sum is σ = 3673693440. Its totient is φ = 273039360.

The previous prime is 1089625861. The next prime is 1089625921. The reversal of 1089625920 is 295269801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089625921) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1346476 + ... + 1347284.

Almost surely, 2^1089625920 is an apocalyptic number.

1089625920 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 1089625920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836846720).

1089625920 is an abundant number, since it is smaller than the sum of its proper divisors (2584067520).

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

1089625920 is a wasteful number, since it uses less digits than its factorization.

1089625920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1089625920 is about 33009.4822740376. The cubic root of 1089625920 is about 1029.0247217204.

The spelling of 1089625920 in words is "one billion, eighty-nine million, six hundred twenty-five thousand, nine hundred twenty".