128492244378 has 32 divisors (see below), whose sum is σ = 287622558720. Its totient is φ = 42518112480.

The previous prime is 128492244373. The next prime is 128492244401. The reversal of 128492244378 is 873442294821.

128492244378 is a `hidden beast` number, since 1 + 2 + 8 + 49 + 224 + 4 + 378 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (128492244371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8676858 + ... + 8691653.

It is an arithmetic number, because the mean of its divisors is an integer number (8988204960).

Almost surely, 2^128492244378 is an apocalyptic number.

128492244378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128492244378 is an abundant number, since it is smaller than the sum of its proper divisors (159130314342).

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

128492244378 is a wasteful number, since it uses less digits than its factorization.

128492244378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17368659 (or 17368653 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 128492244378 in words is "one hundred twenty-eight billion, four hundred ninety-two million, two hundred forty-four thousand, three hundred seventy-eight".