1909899228 has 48 divisors (see below), whose sum is σ = 4805418240. Its totient is φ = 588412800.

The previous prime is 1909899179. The next prime is 1909899239. The reversal of 1909899228 is 8229989091.

It is a super-2 number, since 2×1909899228² = 7295430122229991968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92808 + ... + 111503.

It is an arithmetic number, because the mean of its divisors is an integer number (100112880).

Almost surely, 2^1909899228 is an apocalyptic number.

It is an amenable number.

1909899228 is an abundant number, since it is smaller than the sum of its proper divisors (2895519012).

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

1909899228 is a wasteful number, since it uses less digits than its factorization.

1909899228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204378 (or 204376 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 1909899228 is about 43702.3938474771. The cubic root of 1909899228 is about 1240.7096241709.

The spelling of 1909899228 in words is "one billion, nine hundred nine million, eight hundred ninety-nine thousand, two hundred twenty-eight".