8772138 has 40 divisors (see below), whose sum is σ = 19832868. Its totient is φ = 2897856.

The previous prime is 8772089. The next prime is 8772139. The reversal of 8772138 is 8312778.

It can be written as a sum of positive squares in 2 ways, for example, as 8661249 + 110889 = 2943^2 + 333^2 .

It is not an unprimeable number, because it can be changed into a prime (8772139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27870 + ... + 28182.

Almost surely, 2^8772138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8772138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9916434).

8772138 is an abundant number, since it is smaller than the sum of its proper divisors (11060730).

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

8772138 is a wasteful number, since it uses less digits than its factorization.

8772138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 491 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 8772138 is about 2961.7795326459. The cubic root of 8772138 is about 206.2379034228.

The spelling of 8772138 in words is "eight million, seven hundred seventy-two thousand, one hundred thirty-eight".