12650040 has 256 divisors, whose sum is σ = 48988800. Its totient is φ = 2875392.

The previous prime is 12650021. The next prime is 12650051. The reversal of 12650040 is 4005621.

It is a happy number.

12650040 is a `hidden beast` number, since 12 + 650 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12649995 and 12650022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 238654 + ... + 238706.

Almost surely, 2^12650040 is an apocalyptic number.

12650040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12650040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24494400).

12650040 is an abundant number, since it is smaller than the sum of its proper divisors (36338760).

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

12650040 is a wasteful number, since it uses less digits than its factorization.

12650040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12650040 is about 3556.6894719669. The cubic root of 12650040 is about 233.0043163255.

Adding to 12650040 its reverse (4005621), we get a palindrome (16655661).

The spelling of 12650040 in words is "twelve million, six hundred fifty thousand, forty".