123888280 has 16 divisors (see below), whose sum is σ = 278748720. Its totient is φ = 49555296.

The previous prime is 123888269. The next prime is 123888361. The reversal of 123888280 is 82888321.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3097207 = 123888280 / (1 + 2 + 3 + 8 + 8 + 8 + 2 + 8 + 0).

It is a congruent number.

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, 1548564 + ... + 1548643.

It is an arithmetic number, because the mean of its divisors is an integer number (17421795).

Almost surely, 2^123888280 is an apocalyptic number.

123888280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123888280 is an abundant number, since it is smaller than the sum of its proper divisors (154860440).

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

123888280 is a wasteful number, since it uses less digits than its factorization.

123888280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097218 (or 3097214 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 123888280 is about 11130.5112191669. The cubic root of 123888280 is about 498.5132904375.

The spelling of 123888280 in words is "one hundred twenty-three million, eight hundred eighty-eight thousand, two hundred eighty".