128390101 has 8 divisors (see below), whose sum is σ = 147611520. Its totient is φ = 109388688.

The previous prime is 128390057. The next prime is 128390113. The reversal of 128390101 is 101093821.

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

It is a cyclic number.

It is not a de Polignac number, because 128390101 - 2¹⁹ = 127865813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128390161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53746 + ... + 56083.

It is an arithmetic number, because the mean of its divisors is an integer number (18451440).

Almost surely, 2^128390101 is an apocalyptic number.

It is an amenable number.

128390101 is a deficient number, since it is larger than the sum of its proper divisors (19221419).

128390101 is a wasteful number, since it uses less digits than its factorization.

128390101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110003.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 128390101 is about 11330.9355747882. The cubic root of 128390101 is about 504.4798762077.

The spelling of 128390101 in words is "one hundred twenty-eight million, three hundred ninety thousand, one hundred one".