8728151994 has 12 divisors (see below), whose sum is σ = 18910996026. Its totient is φ = 2909383992.

The previous prime is 8728151903. The next prime is 8728152031. The reversal of 8728151994 is 4991518278.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8081111025 + 647040969 = 89895^2 + 25437^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8728151994.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 242448649 + ... + 242448684.

Almost surely, 2^8728151994 is an apocalyptic number.

8728151994 is an abundant number, since it is smaller than the sum of its proper divisors (10182844032).

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

8728151994 is a wasteful number, since it uses less digits than its factorization.

8728151994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484897341 (or 484897338 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 8728151994 is about 93424.5791748617. The cubic root of 8728151994 is about 2058.9261372874.

The spelling of 8728151994 in words is "eight billion, seven hundred twenty-eight million, one hundred fifty-one thousand, nine hundred ninety-four".