1317640890 has 32 divisors (see below), whose sum is σ = 3193047936. Its totient is φ = 347958720.

The previous prime is 1317640847. The next prime is 1317640927. The reversal of 1317640890 is 980467131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210121 + ... + 216300.

It is an arithmetic number, because the mean of its divisors is an integer number (99782748).

Almost surely, 2^1317640890 is an apocalyptic number.

1317640890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1317640890 is an abundant number, since it is smaller than the sum of its proper divisors (1875407046).

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

1317640890 is a wasteful number, since it uses less digits than its factorization.

1317640890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426534.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1317640890 is about 36299.3235474161. The cubic root of 1317640890 is about 1096.3074227078.

The spelling of 1317640890 in words is "one billion, three hundred seventeen million, six hundred forty thousand, eight hundred ninety".