855699390 has 480 divisors, whose sum is σ = 3061048320. Its totient is φ = 167401728.

The previous prime is 855699379. The next prime is 855699413. The reversal of 855699390 is 93996558.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 18206347 + ... + 18206393.

It is an arithmetic number, because the mean of its divisors is an integer number (6377184).

Almost surely, 2^855699390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855699390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530524160).

855699390 is an abundant number, since it is smaller than the sum of its proper divisors (2205348930).

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

855699390 is a wasteful number, since it uses less digits than its factorization.

855699390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The square root of 855699390 is about 29252.3399064075. The cubic root of 855699390 is about 949.3807192014.

The spelling of 855699390 in words is "eight hundred fifty-five million, six hundred ninety-nine thousand, three hundred ninety".