128104866 has 24 divisors (see below), whose sum is σ = 280111260. Its totient is φ = 42309216.

The previous prime is 128104831. The next prime is 128104883. The reversal of 128104866 is 668401821.

It can be written as a sum of positive squares in 2 ways, for example, as 126225225 + 1879641 = 11235^2 + 1371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128104866.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30685 + ... + 34608.

Almost surely, 2^128104866 is an apocalyptic number.

128104866 is an abundant number, since it is smaller than the sum of its proper divisors (152006394).

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

128104866 is a wasteful number, since it uses less digits than its factorization.

128104866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65410 (or 65407 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 128104866 is about 11318.3420163909. The cubic root of 128104866 is about 504.1060103913.

The spelling of 128104866 in words is "one hundred twenty-eight million, one hundred four thousand, eight hundred sixty-six".