879533397820 has 144 divisors (see below), whose sum is σ = 2345320020960. Its totient is φ = 273974131200.

The previous prime is 879533397817. The next prime is 879533397871. The reversal of 879533397820 is 28793335978.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18399150 + ... + 18446890.

It is an arithmetic number, because the mean of its divisors is an integer number (16286944590).

Almost surely, 2^879533397820 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 879533397820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172660010480).

879533397820 is an abundant number, since it is smaller than the sum of its proper divisors (1465786623140).

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

879533397820 is a wasteful number, since it uses less digits than its factorization.

879533397820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49484 (or 49475 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 879533397820 in words is "eight hundred seventy-nine billion, five hundred thirty-three million, three hundred ninety-seven thousand, eight hundred twenty".