328440861 has 12 divisors (see below), whose sum is σ = 542188192. Its totient is φ = 187680456.

The previous prime is 328440811. The next prime is 328440899. The reversal of 328440861 is 168044823.

It is not a de Polignac number, because 328440861 - 2⁷ = 328440733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328440811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2606611 + ... + 2606736.

Almost surely, 2^328440861 is an apocalyptic number.

It is an amenable number.

328440861 is a deficient number, since it is larger than the sum of its proper divisors (213747331).

328440861 is a wasteful number, since it uses less digits than its factorization.

328440861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5213360 (or 5213357 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 328440861 is about 18122.9374274702. The cubic root of 328440861 is about 689.9522903370.

The spelling of 328440861 in words is "three hundred twenty-eight million, four hundred forty thousand, eight hundred sixty-one".