128789450 has 24 divisors (see below), whose sum is σ = 253641132. Its totient is φ = 48485120.

The previous prime is 128789431. The next prime is 128789459. The reversal of 128789450 is 54987821.

It can be written as a sum of positive squares in 6 ways, for example, as 107101801 + 21687649 = 10349^2 + 4657^2 .

It is not an unprimeable number, because it can be changed into a prime (128789459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74909 + ... + 76608.

Almost surely, 2^128789450 is an apocalyptic number.

128789450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128789450 is a deficient number, since it is larger than the sum of its proper divisors (124851682).

128789450 is a wasteful number, since it uses less digits than its factorization.

128789450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151546 (or 151541 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 128789450 is about 11348.5439594690. The cubic root of 128789450 is about 505.0023853758.

The spelling of 128789450 in words is "one hundred twenty-eight million, seven hundred eighty-nine thousand, four hundred fifty".