1318923648 has 320 divisors, whose sum is σ = 4754138400. Its totient is φ = 354336768.

The previous prime is 1318923611. The next prime is 1318923659. The reversal of 1318923648 is 8463298131.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1233258 + ... + 1234326.

Almost surely, 2^1318923648 is an apocalyptic number.

1318923648 is a gapful number since it is divisible by the number (18) 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 1318923648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2377069200).

1318923648 is an abundant number, since it is smaller than the sum of its proper divisors (3435214752).

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

1318923648 is a wasteful number, since it uses less digits than its factorization.

1318923648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1098 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1318923648 is about 36316.9884213986. The cubic root of 1318923648 is about 1096.6630686755.

The spelling of 1318923648 in words is "one billion, three hundred eighteen million, nine hundred twenty-three thousand, six hundred forty-eight".