8619640 has 32 divisors (see below), whose sum is σ = 19576080. Its totient is φ = 3415552.

The previous prime is 8619623. The next prime is 8619649. The reversal of 8619640 is 469168.

It is a junction number, because it is equal to n+sod(n) for n = 8619596 and 8619605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8619649) 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, 3567 + ... + 5473.

Almost surely, 2^8619640 is an apocalyptic number.

It is an amenable number.

8619640 is an abundant number, since it is smaller than the sum of its proper divisors (10956440).

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

8619640 is a wasteful number, since it uses less digits than its factorization.

8619640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8619640 is about 2935.9223422972. The cubic root of 8619640 is about 205.0358057624.

It can be divided in two parts, 861 and 9640, that added together give a palindrome (10501).

The spelling of 8619640 in words is "eight million, six hundred nineteen thousand, six hundred forty".