1980396202 has 4 divisors (see below), whose sum is σ = 2970594306. Its totient is φ = 990198100.

The previous prime is 1980396193. The next prime is 1980396203. The reversal of 1980396202 is 2026930891.

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., 1427252841 + 553143361 = 37779^2 + 23519^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1980396203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495099049 + ... + 495099052.

Almost surely, 2^1980396202 is an apocalyptic number.

1980396202 is a deficient number, since it is larger than the sum of its proper divisors (990198104).

1980396202 is an equidigital number, since it uses as much as digits as its factorization.

1980396202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990198103.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1980396202 is about 44501.6426887817. The cubic root of 1980396202 is about 1255.7909865761.

The spelling of 1980396202 in words is "one billion, nine hundred eighty million, three hundred ninety-six thousand, two hundred two".