123840016 has 10 divisors (see below), whose sum is σ = 239940062. Its totient is φ = 61920000.

The previous prime is 123839993. The next prime is 123840091. The reversal of 123840016 is 610048321.

It can be written as a sum of positive squares in only one way, i.e., 95961616 + 27878400 = 9796^2 + 5280^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3869985 + ... + 3870016.

Almost surely, 2^123840016 is an apocalyptic number.

123840016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123840016 is a deficient number, since it is larger than the sum of its proper divisors (116100046).

123840016 is an equidigital number, since it uses as much as digits as its factorization.

123840016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740009 (or 7740003 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 123840016 is about 11128.3429134800. The cubic root of 123840016 is about 498.4485456245.

Adding to 123840016 its reverse (610048321), we get a palindrome (733888337).

The spelling of 123840016 in words is "one hundred twenty-three million, eight hundred forty thousand, sixteen".