1906687860 has 192 divisors, whose sum is σ = 6871302144. Its totient is φ = 383385600.

The previous prime is 1906687859. The next prime is 1906687873. The reversal of 1906687860 is 687866091.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 136564 + ... + 149876.

It is an arithmetic number, because the mean of its divisors is an integer number (35788032).

Almost surely, 2^1906687860 is an apocalyptic number.

1906687860 is a gapful number since it is divisible by the number (10) 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 1906687860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3435651072).

1906687860 is an abundant number, since it is smaller than the sum of its proper divisors (4964614284).

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

1906687860 is a wasteful number, since it uses less digits than its factorization.

1906687860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13374 (or 13372 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1906687860 is about 43665.6370616530. The cubic root of 1906687860 is about 1240.0138439315.

The spelling of 1906687860 in words is "one billion, nine hundred six million, six hundred eighty-seven thousand, eight hundred sixty".