128204964 has 96 divisors (see below), whose sum is σ = 346752000. Its totient is φ = 40919040.

The previous prime is 128204953. The next prime is 128204971. The reversal of 128204964 is 469402821.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 498724 + ... + 498980.

It is an arithmetic number, because the mean of its divisors is an integer number (3612000).

Almost surely, 2^128204964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128204964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173376000).

128204964 is an abundant number, since it is smaller than the sum of its proper divisors (218547036).

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

128204964 is a wasteful number, since it uses less digits than its factorization.

128204964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 128204964 is about 11322.7630903415. The cubic root of 128204964 is about 504.2372748987.

The spelling of 128204964 in words is "one hundred twenty-eight million, two hundred four thousand, nine hundred sixty-four".