1317554940 has 96 divisors (see below), whose sum is σ = 4009642560. Its totient is φ = 321325056.

The previous prime is 1317554923. The next prime is 1317554951. The reversal of 1317554940 is 494557131.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77272 + ... + 92768.

It is an arithmetic number, because the mean of its divisors is an integer number (41767110).

Almost surely, 2^1317554940 is an apocalyptic number.

1317554940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317554940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2004821280).

1317554940 is an abundant number, since it is smaller than the sum of its proper divisors (2692087620).

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

1317554940 is a wasteful number, since it uses less digits than its factorization.

1317554940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15631 (or 15629 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1317554940 is about 36298.1396217492. The cubic root of 1317554940 is about 1096.2835847328.

The spelling of 1317554940 in words is "one billion, three hundred seventeen million, five hundred fifty-four thousand, nine hundred forty".