123523340 has 24 divisors (see below), whose sum is σ = 270678240. Its totient is φ = 47260928.

The previous prime is 123523333. The next prime is 123523357. The reversal of 123523340 is 43325321.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

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, 133805 + ... + 134724.

It is an arithmetic number, because the mean of its divisors is an integer number (11278260).

Almost surely, 2^123523340 is an apocalyptic number.

123523340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123523340 is an abundant number, since it is smaller than the sum of its proper divisors (147154900).

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

123523340 is a wasteful number, since it uses less digits than its factorization.

123523340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268561 (or 268559 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 123523340 is about 11114.1054520821. The cubic root of 123523340 is about 498.0233157366.

Adding to 123523340 its reverse (43325321), we get a palindrome (166848661).

The spelling of 123523340 in words is "one hundred twenty-three million, five hundred twenty-three thousand, three hundred forty".