128285450 has 12 divisors (see below), whose sum is σ = 238611030. Its totient is φ = 51314160.

The previous prime is 128285447. The next prime is 128285461. The reversal of 128285450 is 54582821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 116014441 + 12271009 = 10771^2 + 3503^2 .

It is a super-3 number, since 3×128285450³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128285450.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282805 + ... + 1282904.

Almost surely, 2^128285450 is an apocalyptic number.

128285450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128285450 is a deficient number, since it is larger than the sum of its proper divisors (110325580).

128285450 is a wasteful number, since it uses less digits than its factorization.

128285450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565721 (or 2565716 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 128285450 is about 11326.3167004989. The cubic root of 128285450 is about 504.3427714677.

The spelling of 128285450 in words is "one hundred twenty-eight million, two hundred eighty-five thousand, four hundred fifty".