123378228820 has 192 divisors, whose sum is σ = 325303050240. Its totient is φ = 38185804800.

The previous prime is 123378228817. The next prime is 123378228833. The reversal of 123378228820 is 28822873321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236810160 + ... + 236810680.

It is an arithmetic number, because the mean of its divisors is an integer number (1694286720).

Almost surely, 2^123378228820 is an apocalyptic number.

123378228820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123378228820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162651525120).

123378228820 is an abundant number, since it is smaller than the sum of its proper divisors (201924821420).

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

123378228820 is a wasteful number, since it uses less digits than its factorization.

123378228820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 1332 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 123378228820 in words is "one hundred twenty-three billion, three hundred seventy-eight million, two hundred twenty-eight thousand, eight hundred twenty".