1909929012 has 24 divisors (see below), whose sum is σ = 4457222112. Its totient is φ = 636540000.

The previous prime is 1909928983. The next prime is 1909929017. The reversal of 1909929012 is 2109299091.

It is a super-2 number, since 2×1909929012² = 7295657661758592288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909929017) 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, 115887 + ... + 131337.

It is an arithmetic number, because the mean of its divisors is an integer number (185717588).

Almost surely, 2^1909929012 is an apocalyptic number.

1909929012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1909929012 is an abundant number, since it is smaller than the sum of its proper divisors (2547293100).

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

1909929012 is a wasteful number, since it uses less digits than its factorization.

1909929012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25759 (or 25757 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 1909929012 is about 43702.7346055141. The cubic root of 1909929012 is about 1240.7160735693.

The spelling of 1909929012 in words is "one billion, nine hundred nine million, nine hundred twenty-nine thousand, twelve".