328280073 has 16 divisors (see below), whose sum is σ = 484227072. Its totient is φ = 196154000.

The previous prime is 328280063. The next prime is 328280077. The reversal of 328280073 is 370082823.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 328280073 - 2⁵ = 328280041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (328280077) 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, 67713 + ... + 72398.

It is an arithmetic number, because the mean of its divisors is an integer number (30264192).

Almost surely, 2^328280073 is an apocalyptic number.

328280073 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

328280073 is a deficient number, since it is larger than the sum of its proper divisors (155946999).

328280073 is a wasteful number, since it uses less digits than its factorization.

328280073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140196.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 328280073 is about 18118.5008485802. The cubic root of 328280073 is about 689.8396834014.

The spelling of 328280073 in words is "three hundred twenty-eight million, two hundred eighty thousand, seventy-three".