1672171886 has 32 divisors (see below), whose sum is σ = 3147932160. Its totient is φ = 647172000.

The previous prime is 1672171883. The next prime is 1672171927. The reversal of 1672171886 is 6881712761.

It is a self number, because there is not a number n which added to its sum of digits gives 1672171886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672171883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12701 + ... + 59208.

It is an arithmetic number, because the mean of its divisors is an integer number (98372880).

Almost surely, 2^1672171886 is an apocalyptic number.

1672171886 is a deficient number, since it is larger than the sum of its proper divisors (1475760274).

1672171886 is a wasteful number, since it uses less digits than its factorization.

1672171886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72080.

The product of its digits is 225792, while the sum is 47.

The square root of 1672171886 is about 40892.1983512748. The cubic root of 1672171886 is about 1186.9350986432.

The spelling of 1672171886 in words is "one billion, six hundred seventy-two million, one hundred seventy-one thousand, eight hundred eighty-six".