1868628172 has 12 divisors (see below), whose sum is σ = 3270712816. Its totient is φ = 934138800.

The previous prime is 1868628161. The next prime is 1868628173. The reversal of 1868628172 is 2718268681.

It is a super-3 number, since 3×1868628172³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1868628173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18168 + ... + 63775.

Almost surely, 2^1868628172 is an apocalyptic number.

It is an amenable number.

1868628172 is a deficient number, since it is larger than the sum of its proper divisors (1402084644).

1868628172 is a wasteful number, since it uses less digits than its factorization.

1868628172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87648 (or 87646 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 1868628172 is about 43227.6320424795. The cubic root of 1868628172 is about 1231.7076270775.

The spelling of 1868628172 in words is "one billion, eight hundred sixty-eight million, six hundred twenty-eight thousand, one hundred seventy-two".