490121236 has 48 divisors (see below), whose sum is σ = 956067840. Its totient is φ = 217980000.

The previous prime is 490121231. The next prime is 490121239. The reversal of 490121236 is 632121094.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490121231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471205 + ... + 472243.

It is an arithmetic number, because the mean of its divisors is an integer number (19918080).

Almost surely, 2^490121236 is an apocalyptic number.

It is an amenable number.

490121236 is a deficient number, since it is larger than the sum of its proper divisors (465946604).

490121236 is a wasteful number, since it uses less digits than its factorization.

490121236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 490121236 is about 22138.6818939159. The cubic root of 490121236 is about 788.4385308479.

The spelling of 490121236 in words is "four hundred ninety million, one hundred twenty-one thousand, two hundred thirty-six".