128401662 has 8 divisors (see below), whose sum is σ = 256803336. Its totient is φ = 42800552.

The previous prime is 128401661. The next prime is 128401687. The reversal of 128401662 is 266104821.

It is a sphenic number, since it is the product of 3 distinct primes.

128401662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128401661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10700133 + ... + 10700144.

It is an arithmetic number, because the mean of its divisors is an integer number (32100417).

Almost surely, 2^128401662 is an apocalyptic number.

128401662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128401662 is a wasteful number, since it uses less digits than its factorization.

128401662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21400282.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 128401662 is about 11331.4457153534. The cubic root of 128401662 is about 504.4950178652.

The spelling of 128401662 in words is "one hundred twenty-eight million, four hundred one thousand, six hundred sixty-two".