7871340 has 48 divisors (see below), whose sum is σ = 23339232. Its totient is φ = 1975296.

The previous prime is 7871329. The next prime is 7871341. The reversal of 7871340 is 431787.

It is a happy number.

7871340 is nontrivially palindromic in base 11.

7871340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7871298 and 7871307.

It is not an unprimeable number, because it can be changed into a prime (7871341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2839 + ... + 4878.

It is an arithmetic number, because the mean of its divisors is an integer number (486234).

Almost surely, 2^7871340 is an apocalyptic number.

It is an amenable number.

7871340 is an abundant number, since it is smaller than the sum of its proper divisors (15467892).

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

7871340 is a wasteful number, since it uses less digits than its factorization.

7871340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746 (or 7744 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 7871340 is about 2805.5908468627. The cubic root of 7871340 is about 198.9220337152.

The spelling of 7871340 in words is "seven million, eight hundred seventy-one thousand, three hundred forty".