2291538 has 16 divisors (see below), whose sum is σ = 4597920. Its totient is φ = 761376.

The previous prime is 2291491. The next prime is 2291539. The reversal of 2291538 is 8351922.

It is a happy number.

It is a super-2 number, since 2×2291538² = 10502292810888, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 2¹³ + 9³ + 1 + 5³ + 3¹¹ + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (2291539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3393 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (287370).

2^2291538 is an apocalyptic number.

2291538 is an abundant number, since it is smaller than the sum of its proper divisors (2306382).

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

2291538 is a wasteful number, since it uses less digits than its factorization.

2291538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241.

The product of its digits is 4320, while the sum is 30.

The square root of 2291538 is about 1513.7826792509. The cubic root of 2291538 is about 131.8385307540.

The spelling of 2291538 in words is "two million, two hundred ninety-one thousand, five hundred thirty-eight".