2639616 has 72 divisors (see below), whose sum is σ = 8045184. Its totient is φ = 752640.

The previous prime is 2639597. The next prime is 2639633. The reversal of 2639616 is 6169362.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5131 + ... + 5621.

2^2639616 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 2639616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4022592).

2639616 is an abundant number, since it is smaller than the sum of its proper divisors (5405568).

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

2639616 is an equidigital number, since it uses as much as digits as its factorization.

2639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 503 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 2639616 is about 1624.6895087985. The cubic root of 2639616 is about 138.2017632588.

The spelling of 2639616 in words is "two million, six hundred thirty-nine thousand, six hundred sixteen".