8573440 has 80 divisors (see below), whose sum is σ = 21875832. Its totient is φ = 3211264.

The previous prime is 8573437. The next prime is 8573441. The reversal of 8573440 is 443758.

It can be written as a sum of positive squares in 4 ways, for example, as 8573184 + 256 = 2928^2 + 16^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (8573441) 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, 43422 + ... + 43618.

Almost surely, 2^8573440 is an apocalyptic number.

8573440 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 8573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10937916).

8573440 is an abundant number, since it is smaller than the sum of its proper divisors (13302392).

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

8573440 is a wasteful number, since it uses less digits than its factorization.

8573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 8573440 is about 2928.0437155207. The cubic root of 8573440 is about 204.6688287652.

The spelling of 8573440 in words is "eight million, five hundred seventy-three thousand, four hundred forty".