123857850 has 48 divisors (see below), whose sum is σ = 310078368. Its totient is φ = 32715840.

The previous prime is 123857849. The next prime is 123857857. The reversal of 123857850 is 58758321.

It is a junction number, because it is equal to n+sod(n) for n = 123857799 and 123857808.

It is not an unprimeable number, because it can be changed into a prime (123857857) 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 23 ways as a sum of consecutive naturals, for example, 12192 + ... + 19908.

It is an arithmetic number, because the mean of its divisors is an integer number (6459966).

Almost surely, 2^123857850 is an apocalyptic number.

123857850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123857850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155039184).

123857850 is an abundant number, since it is smaller than the sum of its proper divisors (186220518).

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

123857850 is a wasteful number, since it uses less digits than its factorization.

123857850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839 (or 7834 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 123857850 is about 11129.1441719478. The cubic root of 123857850 is about 498.4724713984.

The spelling of 123857850 in words is "one hundred twenty-three million, eight hundred fifty-seven thousand, eight hundred fifty".