128916450 has 72 divisors (see below), whose sum is σ = 373015188. Its totient is φ = 31731840.

The previous prime is 128916433. The next prime is 128916479. The reversal of 128916450 is 54619821.

128916450 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 1 + 645 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6305121 + 122611329 = 2511^2 + 11073^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5169 + ... + 16868.

Almost surely, 2^128916450 is an apocalyptic number.

128916450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128916450 is an abundant number, since it is smaller than the sum of its proper divisors (244098738).

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

128916450 is a wasteful number, since it uses less digits than its factorization.

128916450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22068 (or 22060 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 128916450 is about 11354.1380121963. The cubic root of 128916450 is about 505.1683260722.

The spelling of 128916450 in words is "one hundred twenty-eight million, nine hundred sixteen thousand, four hundred fifty".