4139478 has 64 divisors (see below), whose sum is σ = 10782720. Its totient is φ = 1152576.

The previous prime is 4139477. The next prime is 4139491. The reversal of 4139478 is 8749314.

It is a happy number.

It is a super-2 number, since 2×4139478² = 34270556224968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4139477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17650 + ... + 17882.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

Almost surely, 2^4139478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4139478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5391360).

4139478 is an abundant number, since it is smaller than the sum of its proper divisors (6643242).

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

4139478 is a wasteful number, since it uses less digits than its factorization.

4139478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 4139478 is about 2034.5707163920. The cubic root of 4139478 is about 160.5641284484.

The spelling of 4139478 in words is "four million, one hundred thirty-nine thousand, four hundred seventy-eight".