499171806 has 72 divisors (see below), whose sum is σ = 1292294640. Its totient is φ = 136401408.

The previous prime is 499171793. The next prime is 499171807. The reversal of 499171806 is 608171994.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499171807) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 62910 + ... + 70398.

Almost surely, 2^499171806 is an apocalyptic number.

499171806 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 499171806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646147320).

499171806 is an abundant number, since it is smaller than the sum of its proper divisors (793122834).

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

499171806 is a wasteful number, since it uses less digits than its factorization.

499171806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550 (or 7524 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 499171806 is about 22342.1531191602. The cubic root of 499171806 is about 793.2620584619.

The spelling of 499171806 in words is "four hundred ninety-nine million, one hundred seventy-one thousand, eight hundred six".