490801378 has 4 divisors (see below), whose sum is σ = 736202070. Its totient is φ = 245400688.

The previous prime is 490801357. The next prime is 490801387. The reversal of 490801378 is 873108094.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 248283049 + 242518329 = 15757^2 + 15573^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 490801378.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122700343 + ... + 122700346.

Almost surely, 2^490801378 is an apocalyptic number.

490801378 is a deficient number, since it is larger than the sum of its proper divisors (245400692).

490801378 is a wasteful number, since it uses less digits than its factorization.

490801378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245400691.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 490801378 is about 22154.0375101244. The cubic root of 490801378 is about 788.8030680680.

The spelling of 490801378 in words is "four hundred ninety million, eight hundred one thousand, three hundred seventy-eight".