8572240 has 40 divisors (see below), whose sum is σ = 20186208. Its totient is φ = 3384960.

The previous prime is 8572237. The next prime is 8572241. The reversal of 8572240 is 422758.

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 = 8572199 and 8572208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8572241) 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, 5995 + ... + 7285.

Almost surely, 2^8572240 is an apocalyptic number.

8572240 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 8572240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10093104).

8572240 is an abundant number, since it is smaller than the sum of its proper divisors (11613968).

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

8572240 is a wasteful number, since it uses less digits than its factorization.

8572240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 8572240 is about 2927.8387933764. The cubic root of 8572240 is about 204.6592793485.

Adding to 8572240 its reverse (422758), we get a palindrome (8994998).

The spelling of 8572240 in words is "eight million, five hundred seventy-two thousand, two hundred forty".