497778906 has 8 divisors (see below), whose sum is σ = 995557824. Its totient is φ = 165926300.

The previous prime is 497778901. The next prime is 497778907. The reversal of 497778906 is 609877794.

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

497778906 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (497778901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41481570 + ... + 41481581.

It is an arithmetic number, because the mean of its divisors is an integer number (124444728).

Almost surely, 2^497778906 is an apocalyptic number.

497778906 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.

497778906 is a wasteful number, since it uses less digits than its factorization.

497778906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82963156.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The square root of 497778906 is about 22310.9593249596. The cubic root of 497778906 is about 792.5235257904.

The spelling of 497778906 in words is "four hundred ninety-seven million, seven hundred seventy-eight thousand, nine hundred six".