8072240 has 40 divisors (see below), whose sum is σ = 20476368. Its totient is φ = 2935040.

The previous prime is 8072221. The next prime is 8072257. The reversal of 8072240 is 422708.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×8072240² = 130322117235200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3707 + ... + 5466.

Almost surely, 2^8072240 is an apocalyptic number.

8072240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8072240 is an abundant number, since it is smaller than the sum of its proper divisors (12404128).

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

8072240 is a wasteful number, since it uses less digits than its factorization.

8072240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9197 (or 9191 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 8072240 is about 2841.1687735860. The cubic root of 8072240 is about 200.6001970159.

Adding to 8072240 its reverse (422708), we get a palindrome (8494948).

The spelling of 8072240 in words is "eight million, seventy-two thousand, two hundred forty".