1909896664 has 32 divisors (see below), whose sum is σ = 3909366720. Its totient is φ = 869412096.

The previous prime is 1909896647. The next prime is 1909896683. The reversal of 1909896664 is 4666989091.

It is a junction number, because it is equal to n+sod(n) for n = 1909896599 and 1909896608.

It is a congruent number.

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, 118192 + ... + 133375.

It is an arithmetic number, because the mean of its divisors is an integer number (122167710).

Almost surely, 2^1909896664 is an apocalyptic number.

It is an amenable number.

1909896664 is an abundant number, since it is smaller than the sum of its proper divisors (1999470056).

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

1909896664 is a wasteful number, since it uses less digits than its factorization.

1909896664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251659 (or 251655 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The square root of 1909896664 is about 43702.3645126897. The cubic root of 1909896664 is about 1240.7090689617.

The spelling of 1909896664 in words is "one billion, nine hundred nine million, eight hundred ninety-six thousand, six hundred sixty-four".