861828542 has 8 divisors (see below), whose sum is σ = 1292889600. Its totient is φ = 430865344.

The previous prime is 861828533. The next prime is 861828547. The reversal of 861828542 is 245828168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 861828493 and 861828502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861828547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334 + ... + 41742.

It is an arithmetic number, because the mean of its divisors is an integer number (161611200).

Almost surely, 2^861828542 is an apocalyptic number.

861828542 is a deficient number, since it is larger than the sum of its proper divisors (431061058).

861828542 is a wasteful number, since it uses less digits than its factorization.

861828542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48930.

The product of its digits is 245760, while the sum is 44.

The square root of 861828542 is about 29356.9164252651. The cubic root of 861828542 is about 951.6420509798.

The spelling of 861828542 in words is "eight hundred sixty-one million, eight hundred twenty-eight thousand, five hundred forty-two".