123153870 has 64 divisors (see below), whose sum is σ = 339158016. Its totient is φ = 28035840.

The previous prime is 123153869. The next prime is 123153881. The reversal of 123153870 is 78351321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 57967 + ... + 60053.

It is an arithmetic number, because the mean of its divisors is an integer number (5299344).

Almost surely, 2^123153870 is an apocalyptic number.

123153870 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 123153870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169579008).

123153870 is an abundant number, since it is smaller than the sum of its proper divisors (216004146).

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

123153870 is a wasteful number, since it uses less digits than its factorization.

123153870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 123153870 is about 11097.4713335967. The cubic root of 123153870 is about 497.5262748848.

The spelling of 123153870 in words is "one hundred twenty-three million, one hundred fifty-three thousand, eight hundred seventy".