1929817340 has 24 divisors (see below), whose sum is σ = 4421036592. Its totient is φ = 701751680.

The previous prime is 1929817273. The next prime is 1929817391. The reversal of 1929817340 is 437189291.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1929817291 and 1929817300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4385729 + ... + 4386168.

It is an arithmetic number, because the mean of its divisors is an integer number (184209858).

Almost surely, 2^1929817340 is an apocalyptic number.

1929817340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1929817340 is an abundant number, since it is smaller than the sum of its proper divisors (2491219252).

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

1929817340 is a wasteful number, since it uses less digits than its factorization.

1929817340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8771917 (or 8771915 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1929817340 is about 43929.6863180242. The cubic root of 1929817340 is about 1245.0077879977.

The spelling of 1929817340 in words is "one billion, nine hundred twenty-nine million, eight hundred seventeen thousand, three hundred forty".