1909199446 has 24 divisors (see below), whose sum is σ = 3634211016. Its totient is φ = 743843520.

The previous prime is 1909199429. The next prime is 1909199459. The reversal of 1909199446 is 6449919091.

It is a junction number, because it is equal to n+sod(n) for n = 1909199393 and 1909199402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 884451 + ... + 886606.

It is an arithmetic number, because the mean of its divisors is an integer number (151425459).

Almost surely, 2^1909199446 is an apocalyptic number.

1909199446 is a deficient number, since it is larger than the sum of its proper divisors (1725011570).

1909199446 is a wasteful number, since it uses less digits than its factorization.

1909199446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771084 (or 1771077 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1909199446 is about 43694.3868935130. The cubic root of 1909199446 is about 1240.5580747576.

The spelling of 1909199446 in words is "one billion, nine hundred nine million, one hundred ninety-nine thousand, four hundred forty-six".