7822740 has 24 divisors (see below), whose sum is σ = 21903840. Its totient is φ = 2086048.

The previous prime is 7822739. The next prime is 7822741. The reversal of 7822740 is 472287.

It is an interprime number because it is at equal distance from previous prime (7822739) and next prime (7822741).

It is a super-2 number, since 2×7822740² = 122390522215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7822698 and 7822707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7822741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65130 + ... + 65249.

It is an arithmetic number, because the mean of its divisors is an integer number (912660).

Almost surely, 2^7822740 is an apocalyptic number.

It is an amenable number.

7822740 is an abundant number, since it is smaller than the sum of its proper divisors (14081100).

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

7822740 is a wasteful number, since it uses less digits than its factorization.

7822740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130391 (or 130389 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 7822740 is about 2796.9161589150. The cubic root of 7822740 is about 198.5117869095.

The spelling of 7822740 in words is "seven million, eight hundred twenty-two thousand, seven hundred forty".