128924452920 has 64 divisors (see below), whose sum is σ = 399249930240. Its totient is φ = 33270825600.

The previous prime is 128924452919. The next prime is 128924452927. The reversal of 128924452920 is 29254429821.

It is a self number, because there is not a number n which added to its sum of digits gives 128924452920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128924452927) 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, 17324836 + ... + 17332275.

It is an arithmetic number, because the mean of its divisors is an integer number (6238280160).

Almost surely, 2^128924452920 is an apocalyptic number.

128924452920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128924452920 is an abundant number, since it is smaller than the sum of its proper divisors (270325477320).

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

128924452920 is a wasteful number, since it uses less digits than its factorization.

128924452920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34657156 (or 34657152 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 128924452920 in words is "one hundred twenty-eight billion, nine hundred twenty-four million, four hundred fifty-two thousand, nine hundred twenty".