128867697924 has 96 divisors (see below), whose sum is σ = 360662077440. Its totient is φ = 35014835328.

The previous prime is 128867697919. The next prime is 128867698013. The reversal of 128867697924 is 429796768821.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141457 + ... + 527015.

It is an arithmetic number, because the mean of its divisors is an integer number (3756896640).

Almost surely, 2^128867697924 is an apocalyptic number.

128867697924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128867697924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180331038720).

128867697924 is an abundant number, since it is smaller than the sum of its proper divisors (231794379516).

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

128867697924 is a wasteful number, since it uses less digits than its factorization.

128867697924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385769 (or 385767 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 69.

The spelling of 128867697924 in words is "one hundred twenty-eight billion, eight hundred sixty-seven million, six hundred ninety-seven thousand, nine hundred twenty-four".