317640090 has 16 divisors (see below), whose sum is σ = 762336288. Its totient is φ = 84704016.

The previous prime is 317640083. The next prime is 317640101. The reversal of 317640090 is 90046713.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 10588003 = 317640090 / (3 + 1 + 7 + 6 + 4 + 0 + 0 + 9 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5293972 + ... + 5294031.

It is an arithmetic number, because the mean of its divisors is an integer number (47646018).

Almost surely, 2^317640090 is an apocalyptic number.

317640090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

317640090 is an abundant number, since it is smaller than the sum of its proper divisors (444696198).

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

317640090 is a wasteful number, since it uses less digits than its factorization.

317640090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588013.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 317640090 is about 17822.4602678755. The cubic root of 317640090 is about 682.3048161150.

The spelling of 317640090 in words is "three hundred seventeen million, six hundred forty thousand, ninety".