1921799352 has 32 divisors (see below), whose sum is σ = 5241271680. Its totient is φ = 582363360.

The previous prime is 1921799303. The next prime is 1921799353. The reversal of 1921799352 is 2539971291.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921799353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3639508 + ... + 3640035.

It is an arithmetic number, because the mean of its divisors is an integer number (163789740).

Almost surely, 2^1921799352 is an apocalyptic number.

1921799352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1921799352 is an abundant number, since it is smaller than the sum of its proper divisors (3319472328).

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

1921799352 is a wasteful number, since it uses less digits than its factorization.

1921799352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279563 (or 7279559 counting only the distinct ones).

The product of its digits is 306180, while the sum is 48.

The square root of 1921799352 is about 43838.3319938156. The cubic root of 1921799352 is about 1243.2811453935.

The spelling of 1921799352 in words is "one billion, nine hundred twenty-one million, seven hundred ninety-nine thousand, three hundred fifty-two".