7840004 has 12 divisors (see below), whose sum is σ = 14091084. Its totient is φ = 3813984.

The previous prime is 7839961. The next prime is 7840013. The reversal of 7840004 is 4000487.

It can be written as a sum of positive squares in 2 ways, for example, as 7011904 + 828100 = 2648^2 + 910^2 .

It is a super-2 number, since 2×7840004² = 122931325440032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26339 + ... + 26634.

It is an arithmetic number, because the mean of its divisors is an integer number (1174257).

Almost surely, 2^7840004 is an apocalyptic number.

7840004 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

7840004 is a deficient number, since it is larger than the sum of its proper divisors (6251080).

7840004 is a wasteful number, since it uses less digits than its factorization.

7840004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53014 (or 53012 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 7840004 is about 2800.0007142856. Note that the first 3 decimals coincide. The cubic root of 7840004 is about 198.6577114612.

The spelling of 7840004 in words is "seven million, eight hundred forty thousand, four".