498781985 has 8 divisors (see below), whose sum is σ = 644579880. Its totient is φ = 368331264.

The previous prime is 498781981. The next prime is 498782017. The reversal of 498781985 is 589187894.

It can be written as a sum of positive squares in 4 ways, for example, as 1982464 + 496799521 = 1408^2 + 22289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 498781985 - 2² = 498781981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (498781981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3836720 + ... + 3836849.

It is an arithmetic number, because the mean of its divisors is an integer number (80572485).

Almost surely, 2^498781985 is an apocalyptic number.

It is an amenable number.

498781985 is a deficient number, since it is larger than the sum of its proper divisors (145797895).

498781985 is a wasteful number, since it uses less digits than its factorization.

498781985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673587.

The product of its digits is 5806080, while the sum is 59.

The square root of 498781985 is about 22333.4275246770. The cubic root of 498781985 is about 793.0555091760.

The spelling of 498781985 in words is "four hundred ninety-eight million, seven hundred eighty-one thousand, nine hundred eighty-five".