123840550 has 12 divisors (see below), whose sum is σ = 230343516. Its totient is φ = 49536200.

The previous prime is 123840547. The next prime is 123840551. The reversal of 123840550 is 55048321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123840551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1238356 + ... + 1238455.

It is an arithmetic number, because the mean of its divisors is an integer number (19195293).

Almost surely, 2^123840550 is an apocalyptic number.

123840550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123840550 is a deficient number, since it is larger than the sum of its proper divisors (106502966).

123840550 is a wasteful number, since it uses less digits than its factorization.

123840550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476823 (or 2476818 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 123840550 is about 11128.3669062446. The cubic root of 123840550 is about 498.4492620626.

Adding to 123840550 its reverse (55048321), we get a palindrome (178888871).

The spelling of 123840550 in words is "one hundred twenty-three million, eight hundred forty thousand, five hundred fifty".