128197230490 has 96 divisors (see below), whose sum is σ = 280642682880. Its totient is φ = 42040366368.

The previous prime is 128197230449. The next prime is 128197230589. The reversal of 128197230490 is 94032791821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 128197230490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5951079 + ... + 5972581.

It is an arithmetic number, because the mean of its divisors is an integer number (2923361280).

Almost surely, 2^128197230490 is an apocalyptic number.

128197230490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128197230490 is an abundant number, since it is smaller than the sum of its proper divisors (152445452390).

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

128197230490 is an equidigital number, since it uses as much as digits as its factorization.

128197230490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21593 (or 21540 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 128197230490 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, two hundred thirty thousand, four hundred ninety".