1318656240 has 640 divisors, whose sum is σ = 5485363200. Its totient is φ = 287400960.

The previous prime is 1318656223. The next prime is 1318656281. The reversal of 1318656240 is 426568131.

It is a happy number.

1318656240 is a `hidden beast` number, since 13 + 1 + 86 + 562 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1318656195 and 1318656204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10383057 + ... + 10383183.

It is an arithmetic number, because the mean of its divisors is an integer number (8570880).

Almost surely, 2^1318656240 is an apocalyptic number.

1318656240 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 1318656240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2742681600).

1318656240 is an abundant number, since it is smaller than the sum of its proper divisors (4166706960).

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

1318656240 is a wasteful number, since it uses less digits than its factorization.

1318656240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1318656240 is about 36313.3066519699. The cubic root of 1318656240 is about 1096.5889485651.

The spelling of 1318656240 in words is "one billion, three hundred eighteen million, six hundred fifty-six thousand, two hundred forty".