1909002144 has 48 divisors (see below), whose sum is σ = 5727008448. Its totient is φ = 545428992.

The previous prime is 1909002119. The next prime is 1909002163. The reversal of 1909002144 is 4412009091.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419717 + ... + 1421060.

It is an arithmetic number, because the mean of its divisors is an integer number (119312676).

Almost surely, 2^1909002144 is an apocalyptic number.

1909002144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1909002144 is an abundant number, since it is smaller than the sum of its proper divisors (3818006304).

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

1909002144 is a wasteful number, since it uses less digits than its factorization.

1909002144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840797 (or 2840789 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1909002144 is about 43692.1290852254. The cubic root of 1909002144 is about 1240.5153390406.

The spelling of 1909002144 in words is "one billion, nine hundred nine million, two thousand, one hundred forty-four".