11997650 has 72 divisors (see below), whose sum is σ = 26717040. Its totient is φ = 3995040.

The previous prime is 11997649. The next prime is 11997659. The reversal of 11997650 is 5679911.

11997650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11997659) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 144509 + ... + 144591.

It is an arithmetic number, because the mean of its divisors is an integer number (371070).

Almost surely, 2^11997650 is an apocalyptic number.

11997650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11997650 is an abundant number, since it is smaller than the sum of its proper divisors (14719390).

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

11997650 is a wasteful number, since it uses less digits than its factorization.

11997650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 11997650 is about 3463.7624052466. The cubic root of 11997650 is about 228.9279026546.

The spelling of 11997650 in words is "eleven million, nine hundred ninety-seven thousand, six hundred fifty".