7243940 has 48 divisors (see below), whose sum is σ = 17478720. Its totient is φ = 2494080.

The previous prime is 7243937. The next prime is 7243949. The reversal of 7243940 is 493427.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7243949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3314 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (364140).

Almost surely, 2^7243940 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 7243940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8739360).

7243940 is an abundant number, since it is smaller than the sum of its proper divisors (10234780).

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

7243940 is a wasteful number, since it uses less digits than its factorization.

7243940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 7243940 is about 2691.4568545678. The cubic root of 7243940 is about 193.4898916837.

It can be divided in two parts, 724 and 3940, that added together give a palindrome (4664).

The spelling of 7243940 in words is "seven million, two hundred forty-three thousand, nine hundred forty".