128809062 has 64 divisors (see below), whose sum is σ = 306869760. Its totient is φ = 39945312.

The previous prime is 128809049. The next prime is 128809069. The reversal of 128809062 is 260908821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128809069) 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, 44553 + ... + 47355.

It is an arithmetic number, because the mean of its divisors is an integer number (4794840).

Almost surely, 2^128809062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128809062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153434880).

128809062 is an abundant number, since it is smaller than the sum of its proper divisors (178060698).

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

128809062 is a wasteful number, since it uses less digits than its factorization.

128809062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 128809062 is about 11349.4080021823. The cubic root of 128809062 is about 505.0280179207.

The spelling of 128809062 in words is "one hundred twenty-eight million, eight hundred nine thousand, sixty-two".