7230440 has 128 divisors (see below), whose sum is σ = 20736000. Its totient is φ = 2257920.

The previous prime is 7230331. The next prime is 7230479. The reversal of 7230440 is 440327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233225 + ... + 233255.

It is an arithmetic number, because the mean of its divisors is an integer number (162000).

Almost surely, 2^7230440 is an apocalyptic number.

7230440 is a gapful number since it is divisible by the number (70) 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 7230440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10368000).

7230440 is an abundant number, since it is smaller than the sum of its proper divisors (13505560).

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

7230440 is a wasteful number, since it uses less digits than its factorization.

7230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 7230440 is about 2688.9477495853. The cubic root of 7230440 is about 193.3696192957.

Adding to 7230440 its reverse (440327), we get a palindrome (7670767).

The spelling of 7230440 in words is "seven million, two hundred thirty thousand, four hundred forty".