1909478468 has 12 divisors (see below), whose sum is σ = 3419298960. Its totient is φ = 932535912.

The previous prime is 1909478453. The next prime is 1909478479. The reversal of 1909478468 is 8648749091.

It is a super-2 number, since 2×1909478468² = 7292216039511254048, which contains 22 as substring.

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, 5550638 + ... + 5550981.

It is an arithmetic number, because the mean of its divisors is an integer number (284941580).

Almost surely, 2^1909478468 is an apocalyptic number.

It is an amenable number.

1909478468 is a deficient number, since it is larger than the sum of its proper divisors (1509820492).

1909478468 is a wasteful number, since it uses less digits than its factorization.

1909478468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101666 (or 11101664 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 1909478468 is about 43697.5796583747. The cubic root of 1909478468 is about 1240.6185060437.

The spelling of 1909478468 in words is "one billion, nine hundred nine million, four hundred seventy-eight thousand, four hundred sixty-eight".