128237490 has 48 divisors (see below), whose sum is σ = 337454208. Its totient is φ = 33782688.

The previous prime is 128237453. The next prime is 128237491. The reversal of 128237490 is 94732821.

128237490 is a `hidden beast` number, since 1 + 282 + 374 + 9 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (128237491) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1114 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (7030296).

Almost surely, 2^128237490 is an apocalyptic number.

128237490 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 128237490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168727104).

128237490 is an abundant number, since it is smaller than the sum of its proper divisors (209216718).

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

128237490 is a wasteful number, since it uses less digits than its factorization.

128237490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17263 (or 17260 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 128237490 is about 11324.1993094435. The cubic root of 128237490 is about 504.2799134838.

The spelling of 128237490 in words is "one hundred twenty-eight million, two hundred thirty-seven thousand, four hundred ninety".