858426660 has 336 divisors, whose sum is σ = 3331673856. Its totient is φ = 180838656.

The previous prime is 858426649. The next prime is 858426661. The reversal of 858426660 is 66624858.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (858426661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1326457 + ... + 1327103.

It is an arithmetic number, because the mean of its divisors is an integer number (9915696).

Almost surely, 2^858426660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858426660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665836928).

858426660 is an abundant number, since it is smaller than the sum of its proper divisors (2473247196).

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

858426660 is a wasteful number, since it uses less digits than its factorization.

858426660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 858426660 is about 29298.9190926901. The cubic root of 858426660 is about 950.3882660397.

The spelling of 858426660 in words is "eight hundred fifty-eight million, four hundred twenty-six thousand, six hundred sixty".