4391478 has 72 divisors (see below), whose sum is σ = 11950848. Its totient is φ = 1155168.

The previous prime is 4391449. The next prime is 4391483. The reversal of 4391478 is 8741934.

It is a happy number.

It is a d-powerful number, because it can be written as 4⁷ + 3¹¹ + 9³ + 1 + 4¹¹ + 7⁴ + 8³ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11275 + ... + 11657.

It is an arithmetic number, because the mean of its divisors is an integer number (165984).

Almost surely, 2^4391478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4391478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5975424).

4391478 is an abundant number, since it is smaller than the sum of its proper divisors (7559370).

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

4391478 is a wasteful number, since it uses less digits than its factorization.

4391478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 408 counting only the distinct ones).

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

The square root of 4391478 is about 2095.5853597503. The cubic root of 4391478 is about 163.7583939912.

The spelling of 4391478 in words is "four million, three hundred ninety-one thousand, four hundred seventy-eight".