328808406434 has 4 divisors (see below), whose sum is σ = 493212609654. Its totient is φ = 164404203216.

The previous prime is 328808406391. The next prime is 328808406467. The reversal of 328808406434 is 434604808823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434604808823 = 239803 ⋅1812341.

It can be written as a sum of positive squares in only one way, i.e., 328554800809 + 253605625 = 573197^2 + 15925^2 .

It is a super-2 number, since 2×328808406434² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82202101607 + ... + 82202101610.

Almost surely, 2^328808406434 is an apocalyptic number.

328808406434 is a deficient number, since it is larger than the sum of its proper divisors (164404203220).

328808406434 is a wasteful number, since it uses less digits than its factorization.

328808406434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164404203219.

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 328808406434 in words is "three hundred twenty-eight billion, eight hundred eight million, four hundred six thousand, four hundred thirty-four".