1518728380 has 24 divisors (see below), whose sum is σ = 3434663232. Its totient is φ = 560761152.

The previous prime is 1518728363. The next prime is 1518728383. The reversal of 1518728380 is 838278151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1518728383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920372 + ... + 2920891.

It is an arithmetic number, because the mean of its divisors is an integer number (143110968).

Almost surely, 2^1518728380 is an apocalyptic number.

1518728380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1518728380 is an abundant number, since it is smaller than the sum of its proper divisors (1915934852).

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

1518728380 is a wasteful number, since it uses less digits than its factorization.

1518728380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841285 (or 5841283 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 1518728380 is about 38970.8657845832. The cubic root of 1518728380 is about 1149.4586942073.

The spelling of 1518728380 in words is "one billion, five hundred eighteen million, seven hundred twenty-eight thousand, three hundred eighty".