8365440 has 64 divisors (see below), whose sum is σ = 26670960. Its totient is φ = 2230272.

The previous prime is 8365421. The next prime is 8365447. The reversal of 8365440 is 445638.

8365440 is digitally balanced in base 4 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8365398 and 8365407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8365447) 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, 259 + ... + 4098.

Almost surely, 2^8365440 is an apocalyptic number.

8365440 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 8365440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13335480).

8365440 is an abundant number, since it is smaller than the sum of its proper divisors (18305520).

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

8365440 is a wasteful number, since it uses less digits than its factorization.

8365440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379 (or 4367 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 8365440 is about 2892.3070376431. The cubic root of 8365440 is about 203.0001051550. Note that the first 3 decimals are identical.

The spelling of 8365440 in words is "eight million, three hundred sixty-five thousand, four hundred forty".