1992279220 has 24 divisors (see below), whose sum is σ = 4184624808. Its totient is φ = 796752000.

The previous prime is 1992279209. The next prime is 1992279221. The reversal of 1992279220 is 229722991.

It can be written as a sum of positive squares in 4 ways, for example, as 729756196 + 1262523024 = 27014^2 + 35532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992279221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192990 + ... + 203050.

It is an arithmetic number, because the mean of its divisors is an integer number (174359367).

Almost surely, 2^1992279220 is an apocalyptic number.

1992279220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1992279220 is an abundant number, since it is smaller than the sum of its proper divisors (2192345588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1992279220 is a wasteful number, since it uses less digits than its factorization.

1992279220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19971 (or 19969 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1992279220 is about 44634.9551360814. The cubic root of 1992279220 is about 1258.2976969670.

The spelling of 1992279220 in words is "one billion, nine hundred ninety-two million, two hundred seventy-nine thousand, two hundred twenty".