7572240 has 120 divisors (see below), whose sum is σ = 27420120. Its totient is φ = 1861632.

The previous prime is 7572233. The next prime is 7572247. The reversal of 7572240 is 422757.

It is an interprime number because it is at equal distance from previous prime (7572233) and next prime (7572247).

It can be written as a sum of positive squares in 4 ways, for example, as 853776 + 6718464 = 924^2 + 2592^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (7572247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8956 + ... + 9764.

It is an arithmetic number, because the mean of its divisors is an integer number (228501).

Almost surely, 2^7572240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7572240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13710060).

7572240 is an abundant number, since it is smaller than the sum of its proper divisors (19847880).

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

7572240 is a wasteful number, since it uses less digits than its factorization.

7572240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 7572240 is about 2751.7703392543. The cubic root of 7572240 is about 196.3698417418.

Adding to 7572240 its reverse (422757), we get a palindrome (7994997).

The spelling of 7572240 in words is "seven million, five hundred seventy-two thousand, two hundred forty".