7671728 has 20 divisors (see below), whose sum is σ = 15266880. Its totient is φ = 3731904.

The previous prime is 7671721. The next prime is 7671731. The reversal of 7671728 is 8271767.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7671691 and 7671700.

It is not an unprimeable number, because it can be changed into a prime (7671721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5888 + ... + 7071.

It is an arithmetic number, because the mean of its divisors is an integer number (763344).

Almost surely, 2^7671728 is an apocalyptic number.

It is an amenable number.

7671728 is a deficient number, since it is larger than the sum of its proper divisors (7595152).

7671728 is a wasteful number, since it uses less digits than its factorization.

7671728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13004 (or 12998 counting only the distinct ones).

The product of its digits is 32928, while the sum is 38.

The square root of 7671728 is about 2769.7884395744. The cubic root of 7671728 is about 197.2261054082.

The spelling of 7671728 in words is "seven million, six hundred seventy-one thousand, seven hundred twenty-eight".