128650662 has 72 divisors (see below), whose sum is σ = 338500656. Its totient is φ = 34585344.

The previous prime is 128650649. The next prime is 128650693. The reversal of 128650662 is 266056821.

128650662 is a `hidden beast` number, since 12 + 86 + 506 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34648 + ... + 38180.

It is an arithmetic number, because the mean of its divisors is an integer number (4701398).

Almost surely, 2^128650662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128650662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169250328).

128650662 is an abundant number, since it is smaller than the sum of its proper divisors (209849994).

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

128650662 is a wasteful number, since it uses less digits than its factorization.

128650662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582 (or 3562 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128650662 is about 11342.4275179522. The cubic root of 128650662 is about 504.8209174510.

The spelling of 128650662 in words is "one hundred twenty-eight million, six hundred fifty thousand, six hundred sixty-two".