7871616 has 48 divisors (see below), whose sum is σ = 22654710. Its totient is φ = 2623488.

The previous prime is 7871599. The next prime is 7871621. The reversal of 7871616 is 6161787.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7617600 + 254016 = 2760^2 + 504^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2265 + ... + 4568.

Almost surely, 2^7871616 is an apocalyptic number.

It is an amenable number.

7871616 is an abundant number, since it is smaller than the sum of its proper divisors (14783094).

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

7871616 is a wasteful number, since it uses less digits than its factorization.

7871616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853 (or 6838 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7871616 is about 2805.6400339317. The cubic root of 7871616 is about 198.9243586831.

The spelling of 7871616 in words is "seven million, eight hundred seventy-one thousand, six hundred sixteen".