7842340 has 48 divisors (see below), whose sum is σ = 18406080. Its totient is φ = 2782080.

The previous prime is 7842337. The next prime is 7842361. The reversal of 7842340 is 432487.

It is a junction number, because it is equal to n+sod(n) for n = 7842299 and 7842308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9046 + ... + 9874.

It is an arithmetic number, because the mean of its divisors is an integer number (383460).

Almost surely, 2^7842340 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 7842340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9203040).

7842340 is an abundant number, since it is smaller than the sum of its proper divisors (10563740).

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

7842340 is a wasteful number, since it uses less digits than its factorization.

7842340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 7842340 is about 2800.4178259681. The cubic root of 7842340 is about 198.6774401216.

The spelling of 7842340 in words is "seven million, eight hundred forty-two thousand, three hundred forty".