7873640 has 32 divisors (see below), whose sum is σ = 18151560. Its totient is φ = 3072000.

The previous prime is 7873633. The next prime is 7873651. The reversal of 7873640 is 463787.

It can be written as a sum of positive squares in 4 ways, for example, as 4553956 + 3319684 = 2134^2 + 1822^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7873640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761 + ... + 4040.

Almost surely, 2^7873640 is an apocalyptic number.

It is an amenable number.

7873640 is an abundant number, since it is smaller than the sum of its proper divisors (10277920).

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

7873640 is a wasteful number, since it uses less digits than its factorization.

7873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853 (or 4849 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 7873640 is about 2806.0007127583. Note that the first 3 decimals coincide. The cubic root of 7873640 is about 198.9414067877.

The spelling of 7873640 in words is "seven million, eight hundred seventy-three thousand, six hundred forty".