7840198 has 12 divisors (see below), whose sum is σ = 12412980. Its totient is φ = 3713436.

The previous prime is 7840177. The next prime is 7840199. The reversal of 7840198 is 8910487.

It is a super-2 number, since 2×7840198² = 122937409358408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4708 + ... + 6151.

It is an arithmetic number, because the mean of its divisors is an integer number (1034415).

Almost surely, 2^7840198 is an apocalyptic number.

7840198 is a deficient number, since it is larger than the sum of its proper divisors (4572782).

7840198 is a wasteful number, since it uses less digits than its factorization.

7840198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10899 (or 10880 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 7840198 is about 2800.0353569196. The cubic root of 7840198 is about 198.6593500351.

The spelling of 7840198 in words is "seven million, eight hundred forty thousand, one hundred ninety-eight".