128402344392 has 96 divisors (see below), whose sum is σ = 386291462400. Its totient is φ = 35421326976.

The previous prime is 128402344381. The next prime is 128402344439. The reversal of 128402344392 is 293443204821.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 23 ways as a sum of consecutive naturals, for example, 1848408 + ... + 1916615.

It is an arithmetic number, because the mean of its divisors is an integer number (4023869400).

Almost surely, 2^128402344392 is an apocalyptic number.

128402344392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128402344392 is an abundant number, since it is smaller than the sum of its proper divisors (257889118008).

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

128402344392 is a wasteful number, since it uses less digits than its factorization.

128402344392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765075 (or 3765064 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 128402344392 in words is "one hundred twenty-eight billion, four hundred two million, three hundred forty-four thousand, three hundred ninety-two".