128896851 has 8 divisors (see below), whose sum is σ = 177788880. Its totient is φ = 82968032.

The previous prime is 128896847. The next prime is 128896897. The reversal of 128896851 is 158698821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128896851 - 2² = 128896847 is a prime.

It is a super-2 number, since 2×128896851² = 33228796395432402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128896851.

It is not an unprimeable number, because it can be changed into a prime (128896841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740700 + ... + 740873.

It is an arithmetic number, because the mean of its divisors is an integer number (22223610).

Almost surely, 2^128896851 is an apocalyptic number.

128896851 is a deficient number, since it is larger than the sum of its proper divisors (48892029).

128896851 is a wasteful number, since it uses less digits than its factorization.

128896851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481605.

The product of its digits is 276480, while the sum is 48.

The square root of 128896851 is about 11353.2749019831. The cubic root of 128896851 is about 505.1427247473.

The spelling of 128896851 in words is "one hundred twenty-eight million, eight hundred ninety-six thousand, eight hundred fifty-one".