123940536 has 16 divisors (see below), whose sum is σ = 309851400. Its totient is φ = 41313504.

The previous prime is 123940507. The next prime is 123940543. The reversal of 123940536 is 635049321.

It is a super-2 number, since 2×123940536² = 30722512927934592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123940497 and 123940506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582071 + ... + 2582118.

Almost surely, 2^123940536 is an apocalyptic number.

It is an amenable number.

123940536 is an abundant number, since it is smaller than the sum of its proper divisors (185910864).

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

123940536 is a wasteful number, since it uses less digits than its factorization.

123940536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164198 (or 5164194 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 123940536 is about 11132.8583930633. The cubic root of 123940536 is about 498.5833714510.

Adding to 123940536 its reverse (635049321), we get a palindrome (758989857).

The spelling of 123940536 in words is "one hundred twenty-three million, nine hundred forty thousand, five hundred thirty-six".