7871740 has 12 divisors (see below), whose sum is σ = 16530696. Its totient is φ = 3148688.

The previous prime is 7871729. The next prime is 7871741. The reversal of 7871740 is 471787.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 7871696 and 7871705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871741) 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 3 ways as a sum of consecutive naturals, for example, 196774 + ... + 196813.

It is an arithmetic number, because the mean of its divisors is an integer number (1377558).

Almost surely, 2^7871740 is an apocalyptic number.

It is an amenable number.

7871740 is an abundant number, since it is smaller than the sum of its proper divisors (8658956).

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

7871740 is a wasteful number, since it uses less digits than its factorization.

7871740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393596 (or 393594 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 7871740 is about 2805.6621321891. The cubic root of 7871740 is about 198.9254032163.

The spelling of 7871740 in words is "seven million, eight hundred seventy-one thousand, seven hundred forty".