1923139650 has 48 divisors (see below), whose sum is σ = 4773007008. Its totient is φ = 512448000.

The previous prime is 1923139607. The next prime is 1923139651. The reversal of 1923139650 is 569313291.

It is a super-2 number, since 2×1923139650² = 7396932226804245000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1923139599 and 1923139608.

It is not an unprimeable number, because it can be changed into a prime (1923139651) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 231570 + ... + 239730.

It is an arithmetic number, because the mean of its divisors is an integer number (99437646).

Almost surely, 2^1923139650 is an apocalyptic number.

1923139650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1923139650 is an abundant number, since it is smaller than the sum of its proper divisors (2849867358).

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

1923139650 is a wasteful number, since it uses less digits than its factorization.

1923139650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747 (or 9742 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 1923139650 is about 43853.6161564813. The cubic root of 1923139650 is about 1243.5701072278.

The spelling of 1923139650 in words is "one billion, nine hundred twenty-three million, one hundred thirty-nine thousand, six hundred fifty".