8969840 has 40 divisors (see below), whose sum is σ = 22753008. Its totient is φ = 3261440.

The previous prime is 8969813. The next prime is 8969887. The reversal of 8969840 is 489698.

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

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 8969791 and 8969800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4217 + ... + 5976.

Almost surely, 2^8969840 is an apocalyptic number.

8969840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8969840 is an abundant number, since it is smaller than the sum of its proper divisors (13783168).

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

8969840 is a wasteful number, since it uses less digits than its factorization.

8969840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217 (or 10211 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 8969840 is about 2994.9691150327. The cubic root of 8969840 is about 207.7757692069.

The spelling of 8969840 in words is "eight million, nine hundred sixty-nine thousand, eight hundred forty".