869839542 has 96 divisors (see below), whose sum is σ = 2239604640. Its totient is φ = 240514560.

The previous prime is 869839541. The next prime is 869839583. The reversal of 869839542 is 245938968.

869839542 is a `hidden beast` number, since 8 + 6 + 98 + 3 + 9 + 542 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869839541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227188 + ... + 230984.

It is an arithmetic number, because the mean of its divisors is an integer number (23329215).

Almost surely, 2^869839542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869839542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119802320).

869839542 is an abundant number, since it is smaller than the sum of its proper divisors (1369765098).

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

869839542 is a wasteful number, since it uses less digits than its factorization.

869839542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918 (or 3915 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 869839542 is about 29493.0422642358. The cubic root of 869839542 is about 954.5815777993.

The spelling of 869839542 in words is "eight hundred sixty-nine million, eight hundred thirty-nine thousand, five hundred forty-two".