1922209920 has 256 divisors, whose sum is σ = 6857827200. Its totient is φ = 508833792.

The previous prime is 1922209867. The next prime is 1922209931. The reversal of 1922209920 is 299022291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2989119 + ... + 2989761.

Almost surely, 2^1922209920 is an apocalyptic number.

1922209920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1922209920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3428913600).

1922209920 is an abundant number, since it is smaller than the sum of its proper divisors (4935617280).

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

1922209920 is a wasteful number, since it uses less digits than its factorization.

1922209920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1922209920 is about 43843.0144948999. The cubic root of 1922209920 is about 1243.3696761597.

The spelling of 1922209920 in words is "one billion, nine hundred twenty-two million, two hundred nine thousand, nine hundred twenty".