123523280 has 40 divisors (see below), whose sum is σ = 288672000. Its totient is φ = 49154688.

The previous prime is 123523273. The next prime is 123523289. The reversal of 123523280 is 82325321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123523289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12041 + ... + 19799.

It is an arithmetic number, because the mean of its divisors is an integer number (7216800).

Almost surely, 2^123523280 is an apocalyptic number.

123523280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123523280 is an abundant number, since it is smaller than the sum of its proper divisors (165148720).

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

123523280 is a wasteful number, since it uses less digits than its factorization.

123523280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 123523280 is about 11114.1027528092. The cubic root of 123523280 is about 498.0232351003.

The spelling of 123523280 in words is "one hundred twenty-three million, five hundred twenty-three thousand, two hundred eighty".