128373861 has 48 divisors (see below), whose sum is σ = 226419200. Its totient is φ = 63154080.

The previous prime is 128373857. The next prime is 128373863. The reversal of 128373861 is 168373821.

It is not a de Polignac number, because 128373861 - 2² = 128373857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128373863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46950 + ... + 49608.

Almost surely, 2^128373861 is an apocalyptic number.

128373861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128373861 is a deficient number, since it is larger than the sum of its proper divisors (98045339).

128373861 is a wasteful number, since it uses less digits than its factorization.

128373861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2699 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 128373861 is about 11330.2189299236. The cubic root of 128373861 is about 504.4586048413.

The spelling of 128373861 in words is "one hundred twenty-eight million, three hundred seventy-three thousand, eight hundred sixty-one".