861604458 has 48 divisors (see below), whose sum is σ = 2039828448. Its totient is φ = 241005600.

The previous prime is 861604453. The next prime is 861604477. The reversal of 861604458 is 854406168.

861604458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861604453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36208 + ... + 55083.

It is an arithmetic number, because the mean of its divisors is an integer number (42496426).

Almost surely, 2^861604458 is an apocalyptic number.

861604458 is an abundant number, since it is smaller than the sum of its proper divisors (1178223990).

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

861604458 is a wasteful number, since it uses less digits than its factorization.

861604458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91331 (or 91320 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 861604458 is about 29353.0996318958. The cubic root of 861604458 is about 951.5595650283.

The spelling of 861604458 in words is "eight hundred sixty-one million, six hundred four thousand, four hundred fifty-eight".