1822723820 has 12 divisors (see below), whose sum is σ = 3827720064. Its totient is φ = 729089520.

The previous prime is 1822723813. The next prime is 1822723829. The reversal of 1822723820 is 283272281.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1822723829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45568076 + ... + 45568115.

It is an arithmetic number, because the mean of its divisors is an integer number (318976672).

Almost surely, 2^1822723820 is an apocalyptic number.

1822723820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1822723820 is an abundant number, since it is smaller than the sum of its proper divisors (2004996244).

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

1822723820 is a wasteful number, since it uses less digits than its factorization.

1822723820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91136200 (or 91136198 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1822723820 is about 42693.3697428535. The cubic root of 1822723820 is about 1221.5379287913.

The spelling of 1822723820 in words is "one billion, eight hundred twenty-two million, seven hundred twenty-three thousand, eight hundred twenty".