8728728237 has 30 divisors (see below), whose sum is σ = 13097194154. Its totient is φ = 5793353280.

The previous prime is 8728728223. The next prime is 8728728263. The reversal of 8728728237 is 7328278278.

8728728237 is a `hidden beast` number, since 87 + 287 + 282 + 3 + 7 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 573554601 + 8155173636 = 23949^2 + 90306^2 .

It is not a de Polignac number, because 8728728237 - 2⁴ = 8728728221 is a prime.

It is a super-2 number, since 2×8728728237² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728728277) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16753537 + ... + 16754057.

Almost surely, 2^8728728237 is an apocalyptic number.

It is an amenable number.

8728728237 is a deficient number, since it is larger than the sum of its proper divisors (4368465917).

8728728237 is an frugal number, since it uses more digits than its factorization.

8728728237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 921 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 54.

The square root of 8728728237 is about 93427.6631250081. The cubic root of 8728728237 is about 2058.9714472097.

The spelling of 8728728237 in words is "eight billion, seven hundred twenty-eight million, seven hundred twenty-eight thousand, two hundred thirty-seven".