499983138 has 32 divisors (see below), whose sum is σ = 1169553600. Its totient is φ = 157889088.

The previous prime is 499983091. The next prime is 499983149. The reversal of 499983138 is 831389994.

499983138 is a `hidden beast` number, since 499 + 98 + 31 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242631 + ... + 244682.

It is an arithmetic number, because the mean of its divisors is an integer number (36548550).

Almost surely, 2^499983138 is an apocalyptic number.

499983138 is an abundant number, since it is smaller than the sum of its proper divisors (669570462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

499983138 is a wasteful number, since it uses less digits than its factorization.

499983138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487343 (or 487337 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 499983138 is about 22360.3027260366. The cubic root of 499983138 is about 793.6916036316.

The spelling of 499983138 in words is "four hundred ninety-nine million, nine hundred eighty-three thousand, one hundred thirty-eight".