2478138 has 16 divisors (see below), whose sum is σ = 5337696. Its totient is φ = 762480.

The previous prime is 2478101. The next prime is 2478173. The reversal of 2478138 is 8318742.

It is a super-2 number, since 2×2478138² = 12282335894088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2478099 and 2478108.

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, 15808 + ... + 15963.

It is an arithmetic number, because the mean of its divisors is an integer number (333606).

2^2478138 is an apocalyptic number.

2478138 is an abundant number, since it is smaller than the sum of its proper divisors (2859558).

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

2478138 is a wasteful number, since it uses less digits than its factorization.

2478138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31789.

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

The square root of 2478138 is about 1574.2102782030. The cubic root of 2478138 is about 135.3241046767.

It can be divided in two parts, 247 and 8138, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 2478138 in words is "two million, four hundred seventy-eight thousand, one hundred thirty-eight".