2138578 has 16 divisors (see below), whose sum is σ = 3499776. Its totient is φ = 974160.

The previous prime is 2138569. The next prime is 2138593. The reversal of 2138578 is 8758312.

It is a d-powerful number, because it can be written as 2¹² + 1 + 3¹¹ + 8² + 5⁹ + 7² + 8⁴ .

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, 1663 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (218736).

2^2138578 is an apocalyptic number.

2138578 is a deficient number, since it is larger than the sum of its proper divisors (1361198).

2138578 is a wasteful number, since it uses less digits than its factorization.

2138578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its digits is 13440, while the sum is 34.

The square root of 2138578 is about 1462.3877734719. The cubic root of 2138578 is about 128.8373247407.

The spelling of 2138578 in words is "two million, one hundred thirty-eight thousand, five hundred seventy-eight".