499185978 has 8 divisors (see below), whose sum is σ = 998371968. Its totient is φ = 166395324.

The previous prime is 499185937. The next prime is 499185989. The reversal of 499185978 is 879581994.

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

499185978 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41598826 + ... + 41598837.

It is an arithmetic number, because the mean of its divisors is an integer number (124796496).

Almost surely, 2^499185978 is an apocalyptic number.

499185978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

499185978 is a wasteful number, since it uses less digits than its factorization.

499185978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83197668.

The product of its digits is 6531840, while the sum is 60.

The square root of 499185978 is about 22342.4702752404. The cubic root of 499185978 is about 793.2695655655.

The spelling of 499185978 in words is "four hundred ninety-nine million, one hundred eighty-five thousand, nine hundred seventy-eight".