490185278 has 48 divisors (see below), whose sum is σ = 838397952. Its totient is φ = 214645200.

The previous prime is 490185239. The next prime is 490185281. The reversal of 490185278 is 872581094.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 807251 + ... + 807857.

It is an arithmetic number, because the mean of its divisors is an integer number (17466624).

Almost surely, 2^490185278 is an apocalyptic number.

490185278 is a deficient number, since it is larger than the sum of its proper divisors (348212674).

490185278 is a wasteful number, since it uses less digits than its factorization.

490185278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 490185278 is about 22140.1282290776. The cubic root of 490185278 is about 788.4728699580.

The spelling of 490185278 in words is "four hundred ninety million, one hundred eighty-five thousand, two hundred seventy-eight".