1906591056 has 160 divisors (see below), whose sum is σ = 5211095040. Its totient is φ = 600058368.

The previous prime is 1906591033. The next prime is 1906591067. The reversal of 1906591056 is 6501956091.

It is a junction number, because it is equal to n+sod(n) for n = 1906590999 and 1906591017.

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, 15012465 + ... + 15012591.

It is an arithmetic number, because the mean of its divisors is an integer number (32569344).

Almost surely, 2^1906591056 is an apocalyptic number.

1906591056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906591056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2605547520).

1906591056 is an abundant number, since it is smaller than the sum of its proper divisors (3304503984).

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

1906591056 is a wasteful number, since it uses less digits than its factorization.

1906591056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 1906591056 is about 43664.5285786988. The cubic root of 1906591056 is about 1239.9928580928.

The spelling of 1906591056 in words is "one billion, nine hundred six million, five hundred ninety-one thousand, fifty-six".