1990747222 has 4 divisors (see below), whose sum is σ = 2986120836. Its totient is φ = 995373610.

The previous prime is 1990747189. The next prime is 1990747237. The reversal of 1990747222 is 2227470991.

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, 497686804 + ... + 497686807.

It is an arithmetic number, because the mean of its divisors is an integer number (746530209).

Almost surely, 2^1990747222 is an apocalyptic number.

1990747222 is a deficient number, since it is larger than the sum of its proper divisors (995373614).

1990747222 is an equidigital number, since it uses as much as digits as its factorization.

1990747222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995373613.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 1990747222 is about 44617.7904204141. The cubic root of 1990747222 is about 1257.9750842424.

The spelling of 1990747222 in words is "one billion, nine hundred ninety million, seven hundred forty-seven thousand, two hundred twenty-two".