642880202 has 8 divisors (see below), whose sum is σ = 964525476. Its totient is φ = 321371712.

The previous prime is 642880193. The next prime is 642880213. The reversal of 642880202 is 202088246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 490135321 + 152744881 = 22139^2 + 12359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21503 + ... + 41810.

Almost surely, 2^642880202 is an apocalyptic number.

642880202 is a deficient number, since it is larger than the sum of its proper divisors (321645274).

642880202 is a wasteful number, since it uses less digits than its factorization.

642880202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68392.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 642880202 is about 25355.0823702074. The cubic root of 642880202 is about 863.0646930633.

The spelling of 642880202 in words is "six hundred forty-two million, eight hundred eighty thousand, two hundred two".