123800670 has 128 divisors (see below), whose sum is σ = 389652480. Its totient is φ = 27371520.

The previous prime is 123800669. The next prime is 123800683. The reversal of 123800670 is 76008321.

It is a super-3 number, since 3×123800670³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57534 + ... + 59646.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^123800670 is an apocalyptic number.

123800670 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 123800670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194826240).

123800670 is an abundant number, since it is smaller than the sum of its proper divisors (265851810).

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

123800670 is a wasteful number, since it uses less digits than its factorization.

123800670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 123800670 is about 11126.5749446988. The cubic root of 123800670 is about 498.3957516125.

Adding to 123800670 its reverse (76008321), we get a palindrome (199808991).

The spelling of 123800670 in words is "one hundred twenty-three million, eight hundred thousand, six hundred seventy".