8489940 has 24 divisors (see below), whose sum is σ = 23772000. Its totient is φ = 2263968.

The previous prime is 8489933. The next prime is 8489947. The reversal of 8489940 is 499848.

It is an interprime number because it is at equal distance from previous prime (8489933) and next prime (8489947).

It is a junction number, because it is equal to n+sod(n) for n = 8489892 and 8489901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8489947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70690 + ... + 70809.

It is an arithmetic number, because the mean of its divisors is an integer number (990500).

Almost surely, 2^8489940 is an apocalyptic number.

It is an amenable number.

8489940 is an abundant number, since it is smaller than the sum of its proper divisors (15282060).

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

8489940 is a wasteful number, since it uses less digits than its factorization.

8489940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141511 (or 141509 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 8489940 is about 2913.7501608752. The cubic root of 8489940 is about 204.0022106642.

The spelling of 8489940 in words is "eight million, four hundred eighty-nine thousand, nine hundred forty".