2138478 has 16 divisors (see below), whose sum is σ = 4381776. Its totient is φ = 695360.

The previous prime is 2138467. The next prime is 2138483. The reversal of 2138478 is 8748312.

It is a congruent number.

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, 4101 + ... + 4592.

It is an arithmetic number, because the mean of its divisors is an integer number (273861).

2^2138478 is an apocalyptic number.

2138478 is an abundant number, since it is smaller than the sum of its proper divisors (2243298).

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

2138478 is a wasteful number, since it uses less digits than its factorization.

2138478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739.

The product of its digits is 10752, while the sum is 33.

The square root of 2138478 is about 1462.3535824143. The cubic root of 2138478 is about 128.8353165631.

The spelling of 2138478 in words is "two million, one hundred thirty-eight thousand, four hundred seventy-eight".