855687630 has 256 divisors, whose sum is σ = 2612736000. Its totient is φ = 175042560.

The previous prime is 855687559. The next prime is 855687643. The reversal of 855687630 is 36786558.

It is a self number, because there is not a number n which added to its sum of digits gives 855687630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5742796 + ... + 5742944.

It is an arithmetic number, because the mean of its divisors is an integer number (10206000).

Almost surely, 2^855687630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855687630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306368000).

855687630 is an abundant number, since it is smaller than the sum of its proper divisors (1757048370).

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

855687630 is a wasteful number, since it uses less digits than its factorization.

855687630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The square root of 855687630 is about 29252.1388961560. The cubic root of 855687630 is about 949.3763700228.

The spelling of 855687630 in words is "eight hundred fifty-five million, six hundred eighty-seven thousand, six hundred thirty".