123984377840 has 40 divisors (see below), whose sum is σ = 288611557440. Its totient is φ = 49533901056.

The previous prime is 123984377819. The next prime is 123984377851. The reversal of 123984377840 is 48773489321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868424 + ... + 1001063.

It is an arithmetic number, because the mean of its divisors is an integer number (7215288936).

Almost surely, 2^123984377840 is an apocalyptic number.

123984377840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123984377840 is an abundant number, since it is smaller than the sum of its proper divisors (164627179600).

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

123984377840 is a wasteful number, since it uses less digits than its factorization.

123984377840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870329 (or 1870323 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 123984377840 in words is "one hundred twenty-three billion, nine hundred eighty-four million, three hundred seventy-seven thousand, eight hundred forty".