8181672 has 16 divisors (see below), whose sum is σ = 20454240. Its totient is φ = 2727216.

The previous prime is 8181637. The next prime is 8181697. The reversal of 8181672 is 2761818.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170428 + ... + 170475.

It is an arithmetic number, because the mean of its divisors is an integer number (1278390).

Almost surely, 2^8181672 is an apocalyptic number.

It is an amenable number.

8181672 is an abundant number, since it is smaller than the sum of its proper divisors (12272568).

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

8181672 is a wasteful number, since it uses less digits than its factorization.

8181672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340912 (or 340908 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 8181672 is about 2860.3622148252. The cubic root of 8181672 is about 201.5026157899.

The spelling of 8181672 in words is "eight million, one hundred eighty-one thousand, six hundred seventy-two".