123200440 has 32 divisors (see below), whose sum is σ = 302402160. Its totient is φ = 44800000.

The previous prime is 123200431. The next prime is 123200477. The reversal of 123200440 is 44002321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139561 + ... + 140440.

Almost surely, 2^123200440 is an apocalyptic number.

123200440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123200440 is an abundant number, since it is smaller than the sum of its proper divisors (179201720).

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

123200440 is a wasteful number, since it uses less digits than its factorization.

123200440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280023 (or 280019 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 123200440 is about 11099.5693610158. The cubic root of 123200440 is about 497.5889793122.

Adding to 123200440 its reverse (44002321), we get a palindrome (167202761).

The spelling of 123200440 in words is "one hundred twenty-three million, two hundred thousand, four hundred forty".