1089621416 has 24 divisors (see below), whose sum is σ = 2212288830. Its totient is φ = 502901568.

The previous prime is 1089621413. The next prime is 1089621439. The reversal of 1089621416 is 6141269801.

It can be written as a sum of positive squares in 3 ways, for example, as 770284516 + 319336900 = 27754^2 + 17870^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1089621416.

It is not an unprimeable number, because it can be changed into a prime (1089621413) 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 5 ways as a sum of consecutive naturals, for example, 401615 + ... + 404318.

Almost surely, 2^1089621416 is an apocalyptic number.

It is an amenable number.

1089621416 is an abundant number, since it is smaller than the sum of its proper divisors (1122667414).

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

1089621416 is a wasteful number, since it uses less digits than its factorization.

1089621416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805965 (or 805948 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1089621416 is about 33009.4140511461. The cubic root of 1089621416 is about 1029.0233038840.

The spelling of 1089621416 in words is "one billion, eighty-nine million, six hundred twenty-one thousand, four hundred sixteen".