123953478 has 64 divisors (see below), whose sum is σ = 280253952. Its totient is φ = 36218880.

The previous prime is 123953381. The next prime is 123953483. The reversal of 123953478 is 874359321.

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 31 ways as a sum of consecutive naturals, for example, 471175 + ... + 471437.

It is an arithmetic number, because the mean of its divisors is an integer number (4378968).

Almost surely, 2^123953478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123953478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140126976).

123953478 is an abundant number, since it is smaller than the sum of its proper divisors (156300474).

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

123953478 is a wasteful number, since it uses less digits than its factorization.

123953478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its digits is 181440, while the sum is 42.

The square root of 123953478 is about 11133.4396302311. The cubic root of 123953478 is about 498.6007250455.

The spelling of 123953478 in words is "one hundred twenty-three million, nine hundred fifty-three thousand, four hundred seventy-eight".