328641549 has 16 divisors (see below), whose sum is σ = 458731392. Its totient is φ = 208885248.

The previous prime is 328641541. The next prime is 328641553. The reversal of 328641549 is 945146823.

It is not a de Polignac number, because 328641549 - 2³ = 328641541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328641549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328641541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13989 + ... + 29205.

It is an arithmetic number, because the mean of its divisors is an integer number (28670712).

Almost surely, 2^328641549 is an apocalyptic number.

It is an amenable number.

328641549 is a deficient number, since it is larger than the sum of its proper divisors (130089843).

328641549 is a wasteful number, since it uses less digits than its factorization.

328641549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15556.

The product of its digits is 207360, while the sum is 42.

The square root of 328641549 is about 18128.4734326970. The cubic root of 328641549 is about 690.0927894537.

The spelling of 328641549 in words is "three hundred twenty-eight million, six hundred forty-one thousand, five hundred forty-nine".