123806040 has 32 divisors (see below), whose sum is σ = 371418480. Its totient is φ = 33014912.

The previous prime is 123806021. The next prime is 123806051. The reversal of 123806040 is 40608321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123806040.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 515739 + ... + 515978.

Almost surely, 2^123806040 is an apocalyptic number.

123806040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123806040 is an abundant number, since it is smaller than the sum of its proper divisors (247612440).

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

123806040 is a wasteful number, since it uses less digits than its factorization.

123806040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031731 (or 1031727 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 123806040 is about 11126.8162562343. The cubic root of 123806040 is about 498.4029576761.

The spelling of 123806040 in words is "one hundred twenty-three million, eight hundred six thousand, forty".