328721694 has 24 divisors (see below), whose sum is σ = 764781768. Its totient is φ = 93920400.

The previous prime is 328721683. The next prime is 328721777. The reversal of 328721694 is 496127823.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558757 + ... + 559344.

It is an arithmetic number, because the mean of its divisors is an integer number (31865907).

Almost surely, 2^328721694 is an apocalyptic number.

328721694 is an abundant number, since it is smaller than the sum of its proper divisors (436060074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328721694 is a wasteful number, since it uses less digits than its factorization.

328721694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118120 (or 1118113 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 328721694 is about 18130.6837708896. The cubic root of 328721694 is about 690.1488819670.

The spelling of 328721694 in words is "three hundred twenty-eight million, seven hundred twenty-one thousand, six hundred ninety-four".