128387098840 has 128 divisors (see below), whose sum is σ = 387854853120. Its totient is φ = 36938534400.

The previous prime is 128387098817. The next prime is 128387098843. The reversal of 128387098840 is 48890783821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128387098843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1563196 + ... + 1643275.

It is an arithmetic number, because the mean of its divisors is an integer number (3030116040).

Almost surely, 2^128387098840 is an apocalyptic number.

128387098840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128387098840 is an abundant number, since it is smaller than the sum of its proper divisors (259467754280).

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

128387098840 is a wasteful number, since it uses less digits than its factorization.

128387098840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206513 (or 3206509 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 58.

The spelling of 128387098840 in words is "one hundred twenty-eight billion, three hundred eighty-seven million, ninety-eight thousand, eight hundred forty".