7840742 has 32 divisors (see below), whose sum is σ = 14714112. Its totient is φ = 3050784.

The previous prime is 7840733. The next prime is 7840771. The reversal of 7840742 is 2470487.

It is a super-2 number, since 2×7840742² = 122954470221128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7840699 and 7840708.

It is a congruent number.

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, 11873 + ... + 12515.

It is an arithmetic number, because the mean of its divisors is an integer number (459816).

Almost surely, 2^7840742 is an apocalyptic number.

7840742 is a deficient number, since it is larger than the sum of its proper divisors (6873370).

7840742 is a wasteful number, since it uses less digits than its factorization.

7840742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 7840742 is about 2800.1324968651. The cubic root of 7840742 is about 198.6639446549.

The spelling of 7840742 in words is "seven million, eight hundred forty thousand, seven hundred forty-two".