858761442 has 288 divisors, whose sum is σ = 2549514240. Its totient is φ = 203860800.

The previous prime is 858761417. The next prime is 858761459. The reversal of 858761442 is 244167858.

858761442 is a `hidden beast` number, since 8 + 587 + 61 + 4 + 4 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10870359 + ... + 10870437.

It is an arithmetic number, because the mean of its divisors is an integer number (8852480).

Almost surely, 2^858761442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858761442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274757120).

858761442 is an abundant number, since it is smaller than the sum of its proper divisors (1690752798).

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

858761442 is a wasteful number, since it uses less digits than its factorization.

858761442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 156 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 858761442 is about 29304.6317499470. The cubic root of 858761442 is about 950.5117988338.

The spelling of 858761442 in words is "eight hundred fifty-eight million, seven hundred sixty-one thousand, four hundred forty-two".