499990857 has 8 divisors (see below), whose sum is σ = 666758400. Its totient is φ = 333275280.

The previous prime is 499990849. The next prime is 499990861. The reversal of 499990857 is 758099994.

It is a happy number.

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

It is not a de Polignac number, because 499990857 - 2³ = 499990849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 499990857.

It is not an unprimeable number, because it can be changed into a prime (499990457) 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, 27432 + ... + 41862.

It is an arithmetic number, because the mean of its divisors is an integer number (83344800).

Almost surely, 2^499990857 is an apocalyptic number.

It is an amenable number.

499990857 is a deficient number, since it is larger than the sum of its proper divisors (166767543).

499990857 is a wasteful number, since it uses less digits than its factorization.

499990857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25983.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The square root of 499990857 is about 22360.4753303681. The cubic root of 499990857 is about 793.6956880853.

The spelling of 499990857 in words is "four hundred ninety-nine million, nine hundred ninety thousand, eight hundred fifty-seven".