1922641920 has 520 divisors, whose sum is σ = 7373865840. Its totient is φ = 477757440.

The previous prime is 1922641871. The next prime is 1922641933. The reversal of 1922641920 is 291462291.

1922641920 is a `hidden beast` number, since 1 + 9 + 2 + 2 + 641 + 9 + 2 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31518690 + ... + 31518750.

Almost surely, 2^1922641920 is an apocalyptic number.

1922641920 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 1922641920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3686932920).

1922641920 is an abundant number, since it is smaller than the sum of its proper divisors (5451223920).

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

1922641920 is an equidigital number, since it uses as much as digits as its factorization.

1922641920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1922641920 is about 43847.9408866597. The cubic root of 1922641920 is about 1243.4628146979.

The spelling of 1922641920 in words is "one billion, nine hundred twenty-two million, six hundred forty-one thousand, nine hundred twenty".