328881101 has 4 divisors (see below), whose sum is σ = 330161052. Its totient is φ = 327601152.

The previous prime is 328881079. The next prime is 328881103. The reversal of 328881101 is 101188823.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101188823 = 2633 ⋅38431.

It can be written as a sum of positive squares in 2 ways, for example, as 264062500 + 64818601 = 16250^2 + 8051^2 .

It is a cyclic number.

It is not a de Polignac number, because 328881101 - 2⁶ = 328881037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328881103) 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, 639590 + ... + 640103.

It is an arithmetic number, because the mean of its divisors is an integer number (82540263).

Almost surely, 2^328881101 is an apocalyptic number.

It is an amenable number.

328881101 is a deficient number, since it is larger than the sum of its proper divisors (1279951).

328881101 is a wasteful number, since it uses less digits than its factorization.

328881101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279950.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 328881101 is about 18135.0792940092. The cubic root of 328881101 is about 690.2604218972.

The spelling of 328881101 in words is "three hundred twenty-eight million, eight hundred eighty-one thousand, one hundred one".