2113578 has 24 divisors (see below), whose sum is σ = 4738500. Its totient is φ = 680064.

The previous prime is 2113567. The next prime is 2113583. The reversal of 2113578 is 8753112.

It can be written as a sum of positive squares in 2 ways, for example, as 2082249 + 31329 = 1443^2 + 177^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1503 + ... + 2546.

2^2113578 is an apocalyptic number.

2113578 is an abundant number, since it is smaller than the sum of its proper divisors (2624922).

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

2113578 is a wasteful number, since it uses less digits than its factorization.

2113578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086 (or 4083 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 2113578 is about 1453.8149813508. The cubic root of 2113578 is about 128.3333190907. Note that the first 4 decimals are identical.

The spelling of 2113578 in words is "two million, one hundred thirteen thousand, five hundred seventy-eight".