7840938 has 16 divisors (see below), whose sum is σ = 17922240. Its totient is φ = 2240256.

The previous prime is 7840913. The next prime is 7840949. The reversal of 7840938 is 8390487.

It is a super-2 number, since 2×7840938² = 122960617439688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7840896 and 7840905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 93303 + ... + 93386.

It is an arithmetic number, because the mean of its divisors is an integer number (1120140).

Almost surely, 2^7840938 is an apocalyptic number.

7840938 is an abundant number, since it is smaller than the sum of its proper divisors (10081302).

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

7840938 is a wasteful number, since it uses less digits than its factorization.

7840938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186701.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 7840938 is about 2800.1674949903. The cubic root of 7840938 is about 198.6656000173.

It can be divided in two parts, 7840 and 938, that added together give a palindrome (8778).

The spelling of 7840938 in words is "seven million, eight hundred forty thousand, nine hundred thirty-eight".