4978391 has 8 divisors (see below), whose sum is σ = 5485968. Its totient is φ = 4480000.

The previous prime is 4978367. The next prime is 4978397. The reversal of 4978391 is 1938794.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4978391 - 2¹⁰ = 4977367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (685746).

Almost surely, 2^4978391 is an apocalyptic number.

4978391 is a deficient number, since it is larger than the sum of its proper divisors (507577).

4978391 is a wasteful number, since it uses less digits than its factorization.

4978391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593.

The product of its digits is 54432, while the sum is 41.

The square root of 4978391 is about 2231.2308262481. The cubic root of 4978391 is about 170.7508998021.

It can be divided in two parts, 497 and 8391, that added together give a palindrome (8888).

The spelling of 4978391 in words is "four million, nine hundred seventy-eight thousand, three hundred ninety-one".