8619440 has 40 divisors (see below), whose sum is σ = 20193648. Its totient is φ = 3421440.

The previous prime is 8619439. The next prime is 8619461. The reversal of 8619440 is 449168.

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

It is a junction number, because it is equal to n+sod(n) for n = 8619397 and 8619406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12710 + ... + 13370.

Almost surely, 2^8619440 is an apocalyptic number.

8619440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8619440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10096824).

8619440 is an abundant number, since it is smaller than the sum of its proper divisors (11574208).

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

8619440 is a wasteful number, since it uses less digits than its factorization.

8619440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 8619440 is about 2935.8882812532. Note that the first 3 decimals coincide. The cubic root of 8619440 is about 205.0342199468.

It can be divided in two parts, 861 and 9440, that added together give a palindrome (10301).

The spelling of 8619440 in words is "eight million, six hundred nineteen thousand, four hundred forty".