1980977822 has 4 divisors (see below), whose sum is σ = 2971466736. Its totient is φ = 990488910.

The previous prime is 1980977813. The next prime is 1980977839. The reversal of 1980977822 is 2287790891.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495244454 + ... + 495244457.

It is an arithmetic number, because the mean of its divisors is an integer number (742866684).

Almost surely, 2^1980977822 is an apocalyptic number.

1980977822 is a deficient number, since it is larger than the sum of its proper divisors (990488914).

1980977822 is an equidigital number, since it uses as much as digits as its factorization.

1980977822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990488913.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 1980977822 is about 44508.1770240031. The cubic root of 1980977822 is about 1255.9139117534.

The spelling of 1980977822 in words is "one billion, nine hundred eighty million, nine hundred seventy-seven thousand, eight hundred twenty-two".