1929489440 has 24 divisors (see below), whose sum is σ = 4558419180. Its totient is φ = 771795712.

The previous prime is 1929489361. The next prime is 1929489461. The reversal of 1929489440 is 449849291.

It can be written as a sum of positive squares in 2 ways, for example, as 1750250896 + 179238544 = 41836^2 + 13388^2 .

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 3 ways as a sum of consecutive naturals, for example, 6029495 + ... + 6029814.

Almost surely, 2^1929489440 is an apocalyptic number.

1929489440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1929489440 is an abundant number, since it is smaller than the sum of its proper divisors (2628929740).

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

1929489440 is a wasteful number, since it uses less digits than its factorization.

1929489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12059324 (or 12059316 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1929489440 is about 43925.9540590754. The cubic root of 1929489440 is about 1244.9372698941.

The spelling of 1929489440 in words is "one billion, nine hundred twenty-nine million, four hundred eighty-nine thousand, four hundred forty".