2399616 has 48 divisors (see below), whose sum is σ = 6908460. Its totient is φ = 799488.

The previous prime is 2399611. The next prime is 2399627. The reversal of 2399616 is 6169932.

2399616 is a `hidden beast` number, since 2 + 39 + 9 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399611) 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, 111 + ... + 2193.

2^2399616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2399616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3454230).

2399616 is an abundant number, since it is smaller than the sum of its proper divisors (4508844).

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

2399616 is a wasteful number, since it uses less digits than its factorization.

2399616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103 (or 2088 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 2399616 is about 1549.0693980581. The cubic root of 2399616 is about 133.8794490174.

The spelling of 2399616 in words is "two million, three hundred ninety-nine thousand, six hundred sixteen".