4378491 has 12 divisors (see below), whose sum is σ = 6811168. Its totient is φ = 2694384.

The previous prime is 4378481. The next prime is 4378511. The reversal of 4378491 is 1948734.

It is a happy number.

It is not a de Polignac number, because 4378491 - 2¹⁴ = 4362107 is a prime.

4378491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4378481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18595 + ... + 18828.

Almost surely, 2^4378491 is an apocalyptic number.

4378491 is a deficient number, since it is larger than the sum of its proper divisors (2432677).

4378491 is a wasteful number, since it uses less digits than its factorization.

4378491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37442 (or 37439 counting only the distinct ones).

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

The square root of 4378491 is about 2092.4844085441. The cubic root of 4378491 is about 163.5968060105.

The spelling of 4378491 in words is "four million, three hundred seventy-eight thousand, four hundred ninety-one".