2272638 has 16 divisors (see below), whose sum is σ = 4642560. Its totient is φ = 741336.

The previous prime is 2272631. The next prime is 2272649. The reversal of 2272638 is 8362722.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2² + 2¹⁶ + 7⁴ + 2¹⁹ + 6⁸ + 3⁶ + 8² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3748 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (290160).

2^2272638 is an apocalyptic number.

2272638 is an abundant number, since it is smaller than the sum of its proper divisors (2369922).

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

2272638 is a wasteful number, since it uses less digits than its factorization.

2272638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111.

The product of its digits is 8064, while the sum is 30.

The square root of 2272638 is about 1507.5271141840. The cubic root of 2272638 is about 131.4750732244.

The spelling of 2272638 in words is "two million, two hundred seventy-two thousand, six hundred thirty-eight".