328472947 has 4 divisors (see below), whose sum is σ = 358334136. Its totient is φ = 298611760.

The previous prime is 328472899. The next prime is 328472951. The reversal of 328472947 is 749274823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328472947 - 2⁷ = 328472819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328472897 and 328472906.

It is not an unprimeable number, because it can be changed into a prime (328472447) 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, 14930578 + ... + 14930599.

It is an arithmetic number, because the mean of its divisors is an integer number (89583534).

Almost surely, 2^328472947 is an apocalyptic number.

328472947 is a deficient number, since it is larger than the sum of its proper divisors (29861189).

328472947 is a wasteful number, since it uses less digits than its factorization.

328472947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29861188.

The product of its digits is 677376, while the sum is 46.

The square root of 328472947 is about 18123.8226376226. The cubic root of 328472947 is about 689.9747571806.

The spelling of 328472947 in words is "three hundred twenty-eight million, four hundred seventy-two thousand, nine hundred forty-seven".