128490450 has 96 divisors (see below), whose sum is σ = 355905792. Its totient is φ = 30408000.

The previous prime is 128490449. The next prime is 128490451. The reversal of 128490450 is 54094821.

It is an interprime number because it is at equal distance from previous prime (128490449) and next prime (128490451).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (128490451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70045 + ... + 71855.

It is an arithmetic number, because the mean of its divisors is an integer number (3707352).

Almost surely, 2^128490450 is an apocalyptic number.

128490450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128490450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177952896).

128490450 is an abundant number, since it is smaller than the sum of its proper divisors (227415342).

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

128490450 is a wasteful number, since it uses less digits than its factorization.

128490450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 128490450 is about 11335.3628084857. The cubic root of 128490450 is about 504.6112748833.

The spelling of 128490450 in words is "one hundred twenty-eight million, four hundred ninety thousand, four hundred fifty".