8919440 has 20 divisors (see below), whose sum is σ = 20737884. Its totient is φ = 3567744.

The previous prime is 8919437. The next prime is 8919451. The reversal of 8919440 is 449198.

It can be written as a sum of positive squares in 2 ways, for example, as 1607824 + 7311616 = 1268^2 + 2704^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 8919440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55667 + ... + 55826.

Almost surely, 2^8919440 is an apocalyptic number.

8919440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8919440 is an abundant number, since it is smaller than the sum of its proper divisors (11818444).

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

8919440 is a wasteful number, since it uses less digits than its factorization.

8919440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111506 (or 111500 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8919440 is about 2986.5431522079. The cubic root of 8919440 is about 207.3858858684.

The spelling of 8919440 in words is "eight million, nine hundred nineteen thousand, four hundred forty".