1909931454 has 64 divisors (see below), whose sum is σ = 4536967680. Its totient is φ = 594095040.

The previous prime is 1909931449. The next prime is 1909931461. The reversal of 1909931454 is 4541399091.

1909931454 is a `hidden beast` number, since 190 + 9 + 9 + 3 + 1 + 454 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32169 + ... + 69675.

It is an arithmetic number, because the mean of its divisors is an integer number (70890120).

Almost surely, 2^1909931454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1909931454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2268483840).

1909931454 is an abundant number, since it is smaller than the sum of its proper divisors (2627036226).

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

1909931454 is a wasteful number, since it uses less digits than its factorization.

1909931454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37582 (or 37576 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1909931454 is about 43702.7625442603. The cubic root of 1909931454 is about 1240.7166023547.

The spelling of 1909931454 in words is "one billion, nine hundred nine million, nine hundred thirty-one thousand, four hundred fifty-four".