4491378 has 12 divisors (see below), whose sum is σ = 9731358. Its totient is φ = 1497120.

The previous prime is 4491359. The next prime is 4491401. The reversal of 4491378 is 8731944.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3790809 + 700569 = 1947^2 + 837^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124743 + ... + 124778.

Almost surely, 2^4491378 is an apocalyptic number.

4491378 is an abundant number, since it is smaller than the sum of its proper divisors (5239980).

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

4491378 is a wasteful number, since it uses less digits than its factorization.

4491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249529 (or 249526 counting only the distinct ones).

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

The square root of 4491378 is about 2119.2871443011. The cubic root of 4491378 is about 164.9908534875.

The spelling of 4491378 in words is "four million, four hundred ninety-one thousand, three hundred seventy-eight".