2638650 has 72 divisors (see below), whose sum is σ = 7633440. Its totient is φ = 601440.

The previous prime is 2638633. The next prime is 2638651. The reversal of 2638650 is 568362.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638651) 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, 7171 + ... + 7529.

It is an arithmetic number, because the mean of its divisors is an integer number (106020).

2^2638650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2638650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3816720).

2638650 is an abundant number, since it is smaller than the sum of its proper divisors (4994790).

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

2638650 is a wasteful number, since it uses less digits than its factorization.

2638650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2638650 is about 1624.3921940221. The cubic root of 2638650 is about 138.1849023225.

The spelling of 2638650 in words is "two million, six hundred thirty-eight thousand, six hundred fifty".