83857389210 has 240 divisors, whose sum is σ = 262665623880. Its totient is φ = 19140468480.

The previous prime is 83857389197. The next prime is 83857389211. The reversal of 83857389210 is 1298375838.

It can be written as a sum of positive squares in 4 ways, for example, as 83582857449 + 274531761 = 289107^2 + 16569^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (83857389211) 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 119 ways as a sum of consecutive naturals, for example, 46872996 + ... + 46874784.

Almost surely, 2^83857389210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83857389210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131332811940).

83857389210 is an abundant number, since it is smaller than the sum of its proper divisors (178808234670).

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

83857389210 is a wasteful number, since it uses less digits than its factorization.

83857389210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 83857389210 in words is "eighty-three billion, eight hundred fifty-seven million, three hundred eighty-nine thousand, two hundred ten".