128981450 has 48 divisors (see below), whose sum is σ = 262675896. Its totient is φ = 46828800.

The previous prime is 128981429. The next prime is 128981453. The reversal of 128981450 is 54189821.

It is a Cunningham number, because it is equal to 11357²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 1585081 + 127396369 = 1259^2 + 11287^2 .

It is not an unprimeable number, because it can be changed into a prime (128981453) 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 23 ways as a sum of consecutive naturals, for example, 38024 + ... + 41276.

Almost surely, 2^128981450 is an apocalyptic number.

128981450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128981450 is an abundant number, since it is smaller than the sum of its proper divisors (133694446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128981450 is a wasteful number, since it uses less digits than its factorization.

128981450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339 (or 3334 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 128981450 is about 11357.0000440257. Note that the first 4 decimals coincide. The cubic root of 128981450 is about 505.2532141893.

The spelling of 128981450 in words is "one hundred twenty-eight million, nine hundred eighty-one thousand, four hundred fifty".