128983845 has 16 divisors (see below), whose sum is σ = 218514240. Its totient is φ = 64744704.

The previous prime is 128983823. The next prime is 128983847. The reversal of 128983845 is 548389821.

It is not a de Polignac number, because 128983845 - 2¹⁵ = 128951077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128983794 and 128983803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128983847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252655 + ... + 253164.

It is an arithmetic number, because the mean of its divisors is an integer number (13657140).

Almost surely, 2^128983845 is an apocalyptic number.

128983845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128983845 is a deficient number, since it is larger than the sum of its proper divisors (89530395).

128983845 is a wasteful number, since it uses less digits than its factorization.

128983845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505844.

The product of its digits is 552960, while the sum is 48.

The square root of 128983845 is about 11357.1054851137. The cubic root of 128983845 is about 505.2563414451.

The spelling of 128983845 in words is "one hundred twenty-eight million, nine hundred eighty-three thousand, eight hundred forty-five".