1009919892 has 12 divisors (see below), whose sum is σ = 2356479776. Its totient is φ = 336639960.

The previous prime is 1009919819. The next prime is 1009919951. The reversal of 1009919892 is 2989199001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42079984 + ... + 42080007.

Almost surely, 2^1009919892 is an apocalyptic number.

1009919892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1009919892 is an abundant number, since it is smaller than the sum of its proper divisors (1346559884).

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

1009919892 is a wasteful number, since it uses less digits than its factorization.

1009919892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84159998 (or 84159996 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 48.

The square root of 1009919892 is about 31779.2368064433. The cubic root of 1009919892 is about 1003.2957567214.

The spelling of 1009919892 in words is "one billion, nine million, nine hundred nineteen thousand, eight hundred ninety-two".