490197778 has 16 divisors (see below), whose sum is σ = 840715200. Its totient is φ = 209990736.

The previous prime is 490197731. The next prime is 490197779. The reversal of 490197778 is 877791094.

It is a super-2 number, since 2×490197778² = 480587723112274568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (490197779) 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, 31300 + ... + 44272.

It is an arithmetic number, because the mean of its divisors is an integer number (52544700).

Almost surely, 2^490197778 is an apocalyptic number.

490197778 is a deficient number, since it is larger than the sum of its proper divisors (350517422).

490197778 is a wasteful number, since it uses less digits than its factorization.

490197778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15681.

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 490197778 is about 22140.4105201326. The cubic root of 490197778 is about 788.4795720681.

The spelling of 490197778 in words is "four hundred ninety million, one hundred ninety-seven thousand, seven hundred seventy-eight".