128745760 has 192 divisors, whose sum is σ = 379499904. Its totient is φ = 40550400.

The previous prime is 128745733. The next prime is 128745769. The reversal of 128745760 is 67547821.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128745769) 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, 388795 + ... + 389125.

It is an arithmetic number, because the mean of its divisors is an integer number (1976562).

Almost surely, 2^128745760 is an apocalyptic number.

128745760 is a gapful number since it is divisible by the number (10) 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 128745760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189749952).

128745760 is an abundant number, since it is smaller than the sum of its proper divisors (250754144).

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

128745760 is a wasteful number, since it uses less digits than its factorization.

128745760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 128745760 is about 11346.6188796487. The cubic root of 128745760 is about 504.9452739442.

The spelling of 128745760 in words is "one hundred twenty-eight million, seven hundred forty-five thousand, seven hundred sixty".