317889990 has 72 divisors (see below), whose sum is σ = 908513424. Its totient is φ = 77061600.

The previous prime is 317889973. The next prime is 317890003. The reversal of 317889990 is 99988713.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3706 + ... + 25485.

It is an arithmetic number, because the mean of its divisors is an integer number (12618242).

Almost surely, 2^317889990 is an apocalyptic number.

317889990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 317889990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454256712).

317889990 is an abundant number, since it is smaller than the sum of its proper divisors (590623434).

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

317889990 is a wasteful number, since it uses less digits than its factorization.

317889990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29226 (or 29212 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 317889990 is about 17829.4697060793. The cubic root of 317889990 is about 682.4837012571.

The spelling of 317889990 in words is "three hundred seventeen million, eight hundred eighty-nine thousand, nine hundred ninety".