1992220 has 12 divisors (see below), whose sum is σ = 4183704. Its totient is φ = 796880.

The previous prime is 1992203. The next prime is 1992227. The reversal of 1992220 is 222991.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49786 + ... + 49825.

It is an arithmetic number, because the mean of its divisors is an integer number (348642).

2^1992220 is an apocalyptic number.

1992220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1992220 is an abundant number, since it is smaller than the sum of its proper divisors (2191484).

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

1992220 is a wasteful number, since it uses less digits than its factorization.

1992220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99620 (or 99618 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1992220 is about 1411.4602367761. The cubic root of 1992220 is about 125.8285229316.

The spelling of 1992220 in words is "one million, nine hundred ninety-two thousand, two hundred twenty".