1909479456 has 36 divisors (see below), whose sum is σ = 5430083022. Its totient is φ = 636493056.

The previous prime is 1909479443. The next prime is 1909479463. The reversal of 1909479456 is 6549749091.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1582448400 + 327031056 = 39780^2 + 18084^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1909479456² = 7292223585772111872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3314781 + ... + 3315356.

Almost surely, 2^1909479456 is an apocalyptic number.

1909479456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1909479456 is an abundant number, since it is smaller than the sum of its proper divisors (3520603566).

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

1909479456 is a wasteful number, since it uses less digits than its factorization.

1909479456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630153 (or 6630142 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1909479456 is about 43697.5909633472. The cubic root of 1909479456 is about 1240.6187200168.

The spelling of 1909479456 in words is "one billion, nine hundred nine million, four hundred seventy-nine thousand, four hundred fifty-six".