858461632 has 56 divisors (see below), whose sum is σ = 1992189056. Its totient is φ = 359347968.

The previous prime is 858461587. The next prime is 858461633. The reversal of 858461632 is 236164858.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×858461632² = 1473912747232206848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858461633) 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 7 ways as a sum of consecutive naturals, for example, 3018 + ... + 41545.

Almost surely, 2^858461632 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 858461632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996094528).

858461632 is an abundant number, since it is smaller than the sum of its proper divisors (1133727424).

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

858461632 is a wasteful number, since it uses less digits than its factorization.

858461632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44625 (or 44615 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 858461632 is about 29299.5159004377. The cubic root of 858461632 is about 950.4011720256.

It can be divided in two parts, 85846 and 1632, that added together give a palindrome (87478).

The spelling of 858461632 in words is "eight hundred fifty-eight million, four hundred sixty-one thousand, six hundred thirty-two".