8992640 has 32 divisors (see below), whose sum is σ = 21499560. Its totient is φ = 3596800.

The previous prime is 8992637. The next prime is 8992661. The reversal of 8992640 is 462998.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 8992594 and 8992603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6386 + ... + 7665.

Almost surely, 2^8992640 is an apocalyptic number.

8992640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8992640 is an abundant number, since it is smaller than the sum of its proper divisors (12506920).

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

8992640 is a wasteful number, since it uses less digits than its factorization.

8992640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14070 (or 14058 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8992640 is about 2998.7730824456. The cubic root of 8992640 is about 207.9516652975.

It can be divided in two parts, 89 and 92640, that added together give a palindrome (92729).

The spelling of 8992640 in words is "eight million, nine hundred ninety-two thousand, six hundred forty".