123387980 has 12 divisors (see below), whose sum is σ = 259114800. Its totient is φ = 49355184.

The previous prime is 123387931. The next prime is 123387991. The reversal of 123387980 is 89783321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084680 + ... + 3084719.

It is an arithmetic number, because the mean of its divisors is an integer number (21592900).

Almost surely, 2^123387980 is an apocalyptic number.

123387980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123387980 is an abundant number, since it is smaller than the sum of its proper divisors (135726820).

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

123387980 is a wasteful number, since it uses less digits than its factorization.

123387980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169408 (or 6169406 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 123387980 is about 11108.0142239736. The cubic root of 123387980 is about 497.8413337319.

The spelling of 123387980 in words is "one hundred twenty-three million, three hundred eighty-seven thousand, nine hundred eighty".