123020240 has 40 divisors (see below), whose sum is σ = 326883840. Its totient is φ = 42178176.

The previous prime is 123020239. The next prime is 123020273. The reversal of 123020240 is 42020321.

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

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 109280 + ... + 110399.

It is an arithmetic number, because the mean of its divisors is an integer number (8172096).

Almost surely, 2^123020240 is an apocalyptic number.

123020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123020240 is an abundant number, since it is smaller than the sum of its proper divisors (203863600).

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

123020240 is a wasteful number, since it uses less digits than its factorization.

123020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219699 (or 219693 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 123020240 is about 11091.4489585446. The cubic root of 123020240 is about 497.3462602487.

Adding to 123020240 its reverse (42020321), we get a palindrome (165040561).

The spelling of 123020240 in words is "one hundred twenty-three million, twenty thousand, two hundred forty".