328207780402 has 4 divisors (see below), whose sum is σ = 492311670606. Its totient is φ = 164103890200.

The previous prime is 328207780393. The next prime is 328207780409. The reversal of 328207780402 is 204087702823.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 325971341721 + 2236438681 = 570939^2 + 47291^2 .

It is not an unprimeable number, because it can be changed into a prime (328207780409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82051945099 + ... + 82051945102.

Almost surely, 2^328207780402 is an apocalyptic number.

328207780402 is a deficient number, since it is larger than the sum of its proper divisors (164103890204).

328207780402 is a wasteful number, since it uses less digits than its factorization.

328207780402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164103890203.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 328207780402 in words is "three hundred twenty-eight billion, two hundred seven million, seven hundred eighty thousand, four hundred two".