123864378 has 16 divisors (see below), whose sum is σ = 270249696. Its totient is φ = 37534640.

The previous prime is 123864373. The next prime is 123864383. The reversal of 123864378 is 873468321.

It is an interprime number because it is at equal distance from previous prime (123864373) and next prime (123864383).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (123864373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938301 + ... + 938432.

It is an arithmetic number, because the mean of its divisors is an integer number (16890606).

Almost surely, 2^123864378 is an apocalyptic number.

123864378 is an abundant number, since it is smaller than the sum of its proper divisors (146385318).

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

123864378 is a wasteful number, since it uses less digits than its factorization.

123864378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876749.

The product of its digits is 193536, while the sum is 42.

The square root of 123864378 is about 11129.4374520907. The cubic root of 123864378 is about 498.4812286717.

The spelling of 123864378 in words is "one hundred twenty-three million, eight hundred sixty-four thousand, three hundred seventy-eight".