7240000 has 70 divisors (see below), whose sum is σ = 18052034. Its totient is φ = 2880000.

The previous prime is 7239979. The next prime is 7240001. The reversal of 7240000 is 427.

It can be written as a sum of positive squares in 5 ways, for example, as 5234944 + 2005056 = 2288^2 + 1416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240001) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 39910 + ... + 40090.

Almost surely, 2^7240000 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 7240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9026017).

7240000 is an abundant number, since it is smaller than the sum of its proper divisors (10812034).

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

7240000 is an equidigital number, since it uses as much as digits as its factorization.

7240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 7240000 is about 2690.7248094147. The cubic root of 7240000 is about 193.4548054172.

Adding to 7240000 its reverse (427), we get a palindrome (7240427).

The spelling of 7240000 in words is "seven million, two hundred forty thousand".