1089407440 has 40 divisors (see below), whose sum is σ = 2763135648. Its totient is φ = 396147840.

The previous prime is 1089407419. The next prime is 1089407441. The reversal of 1089407440 is 447049801.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1089407440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089407441) 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 7 ways as a sum of consecutive naturals, for example, 618102 + ... + 619861.

Almost surely, 2^1089407440 is an apocalyptic number.

1089407440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089407440 is an abundant number, since it is smaller than the sum of its proper divisors (1673728208).

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

1089407440 is a wasteful number, since it uses less digits than its factorization.

1089407440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237987 (or 1237981 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1089407440 is about 33006.1727560164. The cubic root of 1089407440 is about 1028.9559408220.

The spelling of 1089407440 in words is "one billion, eighty-nine million, four hundred seven thousand, four hundred forty".