7272040 has 32 divisors (see below), whose sum is σ = 16929000. Its totient is φ = 2808064.

The previous prime is 7272007. The next prime is 7272049. The reversal of 7272040 is 402727.

7272040 = 148² + 149² + ... + 292².

It can be written as a sum of positive squares in 4 ways, for example, as 5317636 + 1954404 = 2306^2 + 1398^2 .

It is not an unprimeable number, because it can be changed into a prime (7272049) 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, 1975 + ... + 4294.

Almost surely, 2^7272040 is an apocalyptic number.

It is an amenable number.

7272040 is an abundant number, since it is smaller than the sum of its proper divisors (9656960).

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

7272040 is a wasteful number, since it uses less digits than its factorization.

7272040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309 (or 6305 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 7272040 is about 2696.6720230684. The cubic root of 7272040 is about 193.7397580434.

Adding to 7272040 its reverse (402727), we get a palindrome (7674767).

The spelling of 7272040 in words is "seven million, two hundred seventy-two thousand, forty".