1518978240 has 336 divisors, whose sum is σ = 5824728000. Its totient is φ = 360751104.

The previous prime is 1518978229. The next prime is 1518978247. The reversal of 1518978240 is 428798151.

1518978240 is a `hidden beast` number, since 1 + 518 + 97 + 8 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1518978247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1085061 + ... + 1086459.

It is an arithmetic number, because the mean of its divisors is an integer number (17335500).

Almost surely, 2^1518978240 is an apocalyptic number.

1518978240 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 1518978240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2912364000).

1518978240 is an abundant number, since it is smaller than the sum of its proper divisors (4305749760).

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

1518978240 is a wasteful number, since it uses less digits than its factorization.

1518978240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1518978240 is about 38974.0713808552. The cubic root of 1518978240 is about 1149.5217267645.

The spelling of 1518978240 in words is "one billion, five hundred eighteen million, nine hundred seventy-eight thousand, two hundred forty".