7242840 has 192 divisors, whose sum is σ = 26956800. Its totient is φ = 1670400.

The previous prime is 7242839. The next prime is 7242847. The reversal of 7242840 is 482427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7242847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122731 + ... + 122789.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

Almost surely, 2^7242840 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 7242840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13478400).

7242840 is an abundant number, since it is smaller than the sum of its proper divisors (19713960).

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

7242840 is a wasteful number, since it uses less digits than its factorization.

7242840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 7242840 is about 2691.2524965153. The cubic root of 7242840 is about 193.4800973060.

The spelling of 7242840 in words is "seven million, two hundred forty-two thousand, eight hundred forty".